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Steve
Steve, Teacher
Category: Homework
Satisfied Customers: 7524
Experience:  I teach Calculus and Probability in a University since 1994
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Steve I need help completing my QNT/351 homework 8-15

Customer Question

Steve
I need help completing my QNT/351 homework 8-15
Submitted: 1 year ago.
Category: Homework
Expert:  Steve replied 1 year ago.
Hi, sure

I will open question 9 now

stay online
Customer: replied 1 year ago.


thank you


 

Expert:  Steve replied 1 year ago.
Question 9)

Answer:

Part a)

(6.9, 55.1)

Let me know....if that`s ok give me the next part
Customer: replied 1 year ago.


Interpret the confidence interval


a. we are 95% confident that each of the population means is contained in the confidence interval


b. We are 95% confident that the difference between the population means falls outside of the confidence interval


c. we are 95% confident that the difference between the population means falls in the confidence interval


d. We are 95% confident that each of the population means falls outside the confidence interval

Expert:  Steve replied 1 year ago.
option c)
Customer: replied 1 year ago.


test the null hypothesis Ho:(μ1 - μ2)=0 versus the alternative hypothesis Ha:(μ1-μ2)≠0.


Give significant level of the test, and interpret the result


 


a. the p-value is approximately 0.0118, so we do not reject Ho for a>0.0059.


b. the p-value is approximately 0.0018, so we reject Ho for a>0.0059.


c. the p-value is approximately 0.0059, so we do not reject Ho for a>0.0059.


d. the p-value is approximately 0.0059, so we reject Ho for a>0.0059.


e. the p-value is approximately 0.0018, so we do not reject Ho for a>0.0018.


f. the p-value is approximately 0.0018, so we reject Ho for a>0.0018.

Expert:  Steve replied 1 year ago.
option f)
Customer: replied 1 year ago.


Suppose the test in part b was conducted with the alternative hypothesis Ha:(μ1-μ2)>0 how would your answer to part b change?


 


a. the p-value would be 0.0059 so we would reject Ho for a>0.0118


b. the p-value would be 0.0118 but we would not reject Ho for a>0.0059.


c. the p-value would be 0.0118 but we would not reject Ho for a>0.0118.


d. the p-value would be 0.0059 so we would reject Ho for a>0.0059.


e. the p-value would be 0.0118 so we would reject Ho for a>0.0118.


f. the p-value would be 0.0059 so we would not reject Ho for a>0.0059.

Expert:  Steve replied 1 year ago.
option d)
Customer: replied 1 year ago.

Test the null hypothesis Ho:(μ1-μ2)=22 versus Ha:(μ1-μ2)≠22. Give significance level and interpret the result


 


a. the p-value is approximately 0.4646 so we do not reject Ho for a≤0.4646


b. the p-value is approximately 0.4646 so we do not reject Ho for a≤0.2323


c. the p-value is approximately 0.2323 so we reject Ho for a≤0.4646


d. the p-value is approximately 0.2323 so we do not reject Ho for a≤0.2323


e. the p-value is approximately 0.2323 so we reject Ho for a≤0.2323


f. the p-value is approximately 0.4646 so we reject Ho for a≤0.4646

Expert:  Steve replied 1 year ago.
option a)
Customer: replied 1 year ago.


What assumptions are necessary to ensure the validity of the inferential procedures applied in parts a-d?


a. we must assume that we have two independent random samples


b. we must assume that the t-distribution should be used


c. we must assume that we have two small samples


d. we must assume that we have two dependent random samples


 

Expert:  Steve replied 1 year ago.
do you know the score from a to d) ???

Thanks
Customer: replied 1 year ago.


I would assume it is question a through question b. is it not?


question a = c


question b = f


question c = d


question d = a

Expert:  Steve replied 1 year ago.
it is from a to d) i think , but do you know the result ?

Were those parts ok ?
Customer: replied 1 year ago.


Yes all of the answers so far were correct. From looking at the answers above I think that we have two independent random samples.

Expert:  Steve replied 1 year ago.
That info is useful to me to answer the last part

Put option a)


Customer: replied 1 year ago.


Wow I was correct the answer was a. that was the last part of 9

Expert:  Steve replied 1 year ago.
Yes, i know that it was the last part

question 10 has 2 parts

but i see that question 13 has 12 parts !!

Can you consider adding a nice bonus ?

How much can you add ?

Thanks

Customer: replied 1 year ago.


yes, I will add 20 more be alright?


 

Expert:  Steve replied 1 year ago.
A tip of $20 ?

Customer: replied 1 year ago.

yes, I can add more.


 


 

Expert:  Steve replied 1 year ago.

Ok, i will tell you after finishing them

Question 10)

a) option B
Customer: replied 1 year ago.


the answer for 10a was not b


a. both populations must be selected independently or each other


b. both sampled populations must be approximately normally distributed. wrong


c. there must be more than 30 samples selected from each population


d. both sampled populations must have approximately equal population variances.


I can make it an even $100 would that be ok?

Expert:  Steve replied 1 year ago.
Yes, that`s ok

Thanks

Ok, can i do it again ?
Customer: replied 1 year ago.


yes it allowed me to do it again

Expert:  Steve replied 1 year ago.
Oh ! i see that you can select more than one option....

Let me think...
Customer: replied 1 year ago.


ok


 

Expert:  Steve replied 1 year ago.
Select B and D

And let me know....
Customer: replied 1 year ago.


good job.


What assumption(s) must be made about the two samples? select all that apply


 


a. the samples must be independent of each other


b. the samples must be normally distributed


c. there must be more than 30 samples selected from each population

Expert:  Steve replied 1 year ago.
option b)
Customer: replied 1 year ago.


must not be all that is applied because it said it was incorrect. would there be another added?

Expert:  Steve replied 1 year ago.
Ok, let me see...
Customer: replied 1 year ago.


I was thinking it would be c. must be more than 30 samples selected from each population because of the t-statistic test or would it mean less than 30 samples?

Expert:  Steve replied 1 year ago.
is less

Expert:  Steve replied 1 year ago.
So try a) and b)

Customer: replied 1 year ago.


nope a&b


the correct is a and I got it correct in final check. it gave me two tries.


11a?

Expert:  Steve replied 1 year ago.
Oh sorry for that

Ok, doing 11 a)

Customer: replied 1 year ago.


You gave me the answer by telling me that it was not c and I knew that it could only be one of the two, thank you


 

Expert:  Steve replied 1 year ago.
Ok, so i helped you a bit...
I will upload the answer for 11 into a word file

wait a minute

Thanks

Customer: replied 1 year ago.

ok


 

Expert:  Steve replied 1 year ago.
Customer: replied 1 year ago.


correct


test the null hypothesis that μ1=μ3, where μi represents the true mean for treatment i, against the alternative that at least two of the means differ. Use a=0.01. choose the correct conclusion below


 


a. reject Ho. There is sufficient evidence to indicate difference among the means.


b. Do not reject Ho. There is insufficient evidence to indicate differences among the means.


c. Reject Ho. There is insufficient evidence to indicate difference among the means.


Do not reject Ho. There is sufficient evidence to indicate difference among the means.

Expert:  Steve replied 1 year ago.
option b)

Customer: replied 1 year ago.


nice 12a?


 

Expert:  Steve replied 1 year ago.
Ok,

working on that
Expert:  Steve replied 1 year ago.
12) a)

Answer: B

Customer: replied 1 year ago.

an ANOVA summary table is shown to the right. Use the information provided to conduct the hypothesis test, part a=0.10


source df ss ms f-value p-value


states 6 0.1304 0.0217 1.63 0.153


error 63 0.8389 0.0133


total 69 0.9693


 


 


a. F>?


b. F<? or F>?


c. F<?

Expert:  Steve replied 1 year ago.
Can you clarify the question ?

Thanks
Customer: replied 1 year ago.


What is the rejection region? Select the correct choice below and fill in the answer box(es) to complete your choice.


 


(round to two decimal places as needed)

Expert:  Steve replied 1 year ago.
Ok,

Answer:

a) F > 3.01
Customer: replied 1 year ago.


incorrect


 


Use a=0.10


 


chart


 


Source /df/ /SS/ /MS/ /F-value/ /p-value/


states /6/ /0.1304/ /0.0217/ /1.63/ /0.153/


Error /63/ /0.8389/ /0.0133/


Total /69/ /0.9693/


 


 

Expert:  Steve replied 1 year ago.
Sorry, i used the previous table

wait a minute
Expert:  Steve replied 1 year ago.

a) F > 1.87

Let me know...
Customer: replied 1 year ago.

Correct



Identify the test statistics, F.


 


F=? (round to two decimal places as needed)


 


 

Expert:  Steve replied 1 year ago.
F = 1.63

Customer: replied 1 year ago.


Correct


Identify the p-value.


 


p=? (round to three decimal places as needed)

Expert:  Steve replied 1 year ago.
p = 0.153

Customer: replied 1 year ago.


correct


Determine the conclusion for the hypothesis test. Choose the correct answer below


 


a. reject the null hypothesis, there is sufficient evidence to conclude that at least two of the states differ with respect to the mean discount percentages.


b. Fail to reject the null hypothesis. There is insufficient evidence to conclude that at least two of the state differ with respect ti the mean substance discount percentages.


c. Reject the null hypothesis. There is insufficient evidence to conclude that at least two of the states are equal with respect to the mean substance discount percentages.


d. Fail to reject the null hypothesis. There is sufficient evidence to conclude that at least two of the states are equal with respect to the mean substance discount percentages.

Expert:  Steve replied 1 year ago.
option b)

I posted the question some minutes ago....but i do not see it
Customer: replied 1 year ago.


Great are you ready 13 with 11 parts?

Expert:  Steve replied 1 year ago.
Oh yes !! i hope short parts

I am doing the first one

Customer: replied 1 year ago.


ok I will try and type as fast as I can to shorten time. I greatly appreciate you being patient with me and I plan on paying at least $100


 

Expert:  Steve replied 1 year ago.
Ok, thanks

I only see parts A and C , can you check it ?

Thanks
Customer: replied 1 year ago.


b. Ho: μ1≠μ2≠μ3≠μ4


Ha: at least two treatment means are equal


 


d. Ho: μ1=μ2=μ3=μ4


Ha: μ1≠μ2≠μ3≠μ4

Expert:  Steve replied 1 year ago.
option c)

Customer: replied 1 year ago.

good


 


Determine the rejection region for the test to compare the mean of each characteristic for the four housing systems. (Use a=0.10)


(Round to two decimal places if needed.)


 


a. F<?


b. F>?


c. F<? or F>?

Expert:  Steve replied 1 year ago.
b) F > 2.31

Let me know...
Customer: replied 1 year ago.


great


What is the test statistic for the test to compare the mean shell thickness for the four housing systems?


 


F=? (round to two decimal places as needed

Expert:  Steve replied 1 year ago.
F = 12

Let me know...
Customer: replied 1 year ago.


Correct


Identify the p-value for the test to compare the mean shell thickness for the four housing systems.


 


p=? (round to three decimal places as needed)

Expert:  Steve replied 1 year ago.
Ok,

p = 0.000



Customer: replied 1 year ago.


correct


Stat the conclusion for the test to compare the mean shell thickness for the four housing systems.


 


a. fail to reject Ho because the test statistic falls in the rejection region


b. reject Ho because the test statistic falls in the rejection region


c. reject Ho because the test statistic does not fall in the rejection region.


d. fail to reject Ho because the test statistic does not fall in the rejection region

Expert:  Steve replied 1 year ago.
ok,

Answer:

option b)
Customer: replied 1 year ago.


Correct


What is the test statistic for the test to compare the mean whipping capacity for the four housing systems


 


F=? (round to two decimal places as needed)

Expert:  Steve replied 1 year ago.
Ok,

F = 38.28

Customer: replied 1 year ago.


identify the p-value for the test to compare the mean whipping capacity for the four housing systems


 


p=? three decimal places as needed

Expert:  Steve replied 1 year ago.
p = 0.000

next...
Customer: replied 1 year ago.


stat the conclusion for the test to compare the mean whipping capacity for the four housing systems.


 


a. fail to reject Ho because the test statistic falls in the rejection region


b. fail to reject Ho because the test statistic does not fall in the rejection region


c. Reject Ho because the test statistic falls in the rejection region


d. reject Ho because the test statistic does not fall in the rejection region.

Expert:  Steve replied 1 year ago.
Ok,

option c)
Customer: replied 1 year ago.


what is the test statistic for the test to compare the mean penetration strength for the four housing systems?


 


F=? (round to two decimal places as needed)

Expert:  Steve replied 1 year ago.
Ok,

Answer: F = 3.28
Customer: replied 1 year ago.


p-value


 


p=? (round to three decimal places as needed)

Expert:  Steve replied 1 year ago.
Ok,

Answer is: p = 0.037
Customer: replied 1 year ago.


State the conclusion for the test to compare the mean penetration strength for the four housing systems.


 


a. fail to reject Ho because the test statistic falls in the rejection region


b. Reject Ho because the test statistic falls in the rejection region


c. Reject Ho because the test statistic does not fall in the rejection region


d. Fail to reject Ho because the test statistic does not fall in the rejection region.

Expert:  Steve replied 1 year ago.
do you know the value of alpha ? ( a = ...)

Thanks
Customer: replied 1 year ago.


(Use a=0.10) Is this what you are wanting other than that it does not give my any choices.

Expert:  Steve replied 1 year ago.
Yes, that`s ok

Then answer: option b)
Customer: replied 1 year ago.


ok last part


identify the characteristic(s) for which housing systems differ. Choose the correct answer below


 


a. Shell thickness, whipping capacity


b. shell thickness, penetration strength


c. whipping capacity


d. shell thickness, whipping capacity, penetration strength


e. penetration strength


f. shell thickness

Expert:  Steve replied 1 year ago.
option d)

Question 14)

a) perfect, positive
b) perfect negative
c) x and y are not linearly related
d) strong positive
e) weak positive
f) strong negative

Let me know.....
Customer: replied 1 year ago.


great 15?

Expert:  Steve replied 1 year ago.
Yes,

15)

all correlations are positive and i think they are weak

So

Part a) B

Let me know....
Customer: replied 1 year ago.

correct
compute the coefficient of determination, r², for professionals, interpret the result


 


r²= ? (round to four decimal places as needed)

Expert:  Steve replied 1 year ago.
r²=0.0841
Customer: replied 1 year ago.


Correct


Which statement below best interprets the coefficient of determination?


 


a. The linear model explains r² * 100% of the variability around the sample mean height of professionals


b. The linear model explains r² * 100% of the variability around the sample mean average earnings in the past decade for professionals


c. The linear model explains (1-r²) * 100% of the variability around the sample mean average earnings in the past decade for professionals

Expert:  Steve replied 1 year ago.
option b)

Let me know...
Customer: replied 1 year ago.

Give Ho and Ha for testing whether average earnings and height are positively correlated. Choose the correct hypothesis below.


a. Ho: ρ=0 vs. Ha: ρ>0


b. Ho: ρ=0 vs. Ha: ρ≠0


c. Ho: ρ=0 vs. Ha: ρ<0

Expert:  Steve replied 1 year ago.
Ok,

answer: option a)
Customer: replied 1 year ago.


The test statistic for testing Ho and Ha in part c is t= r√n-2/√1-r². Compute this value for professionals.


 


t= r√n-2 divided by √1-r²


 


t=? (Round to three decimal places as needed)


 


 

Expert:  Steve replied 1 year ago.
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Steve, Teacher
Category: Homework
Satisfied Customers: 7524
Experience: I teach Calculus and Probability in a University since 1994
Steve and 10 other Homework Specialists are ready to help you
Customer: replied 1 year ago.


last part


Use the result, part d, to conduct the test at a=0.01. Give the appropriate conclusion. What is the appropriate conclusion?


 


a. Reject Ho: there is sufficient evidence to support Ha


b. Do not reject Ho: there is insufficient evidence to support Ha


c. Reject Ho: there is insufficient evidence to support Ha


d. Do not reject Ho: there is sufficient evidence to support Ha.

Expert:  Steve replied 1 year ago.
option a)

Oh .... a long work but i think both of us are happy

How much bonus can you add ?

Thanks
Customer: replied 1 year ago.


would $50 bonus be ok?


 

Expert:  Steve replied 1 year ago.
Oh i thought you talked about $100 but that was a total of $100 ?

In that case $50 is ok

Thanks
Customer: replied 1 year ago.


I wished I had more money today I will never forget this day. Thank you

Expert:  Steve replied 1 year ago.
Thanks for all, next time you can request me writing "For Steve"

Tnanks again and have a good night

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