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Steve, Teacher
Category: Homework
Satisfied Customers: 7610
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

Steve
I need help completing my QNT/351 homework 8-15
Hi, sure

I will open question 9 now

stay online
Customer: replied 3 years ago.

thank you

Question 9)

Part a)

(6.9, 55.1)

Let me know....if that`s ok give me the next part
Customer: replied 3 years 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

option c)
Customer: replied 3 years 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.

option f)
Customer: replied 3 years 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.

option d)
Customer: replied 3 years 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

option a)
Customer: replied 3 years 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

do you know the score from a to d) ???

Thanks
Customer: replied 3 years 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

it is from a to d) i think , but do you know the result ?

Were those parts ok ?
Customer: replied 3 years 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.

That info is useful to me to answer the last part

Put option a)

Customer: replied 3 years ago.

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

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 3 years ago.

yes, I will add 20 more be alright?

A tip of \$20 ?

Customer: replied 3 years ago.

Ok, i will tell you after finishing them

Question 10)

a) option B
Customer: replied 3 years 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?

Yes, that`s ok

Thanks

Ok, can i do it again ?
Customer: replied 3 years ago.

yes it allowed me to do it again

Oh ! i see that you can select more than one option....

Let me think...
Customer: replied 3 years ago.

ok

Select B and D

And let me know....
Customer: replied 3 years 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

option b)
Customer: replied 3 years ago.

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

Ok, let me see...
Customer: replied 3 years 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?

is less

So try a) and b)

Customer: replied 3 years ago.

nope a&b

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

11a?

Oh sorry for that

Ok, doing 11 a)

Customer: replied 3 years 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

Ok, so i helped you a bit...

wait a minute

Thanks

Customer: replied 3 years ago.

ok

Customer: replied 3 years 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.

option b)

Customer: replied 3 years ago.

nice 12a?

Ok,

working on that
12) a)

Customer: replied 3 years 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<?

Can you clarify the question ?

Thanks
Customer: replied 3 years 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)

Ok,

a) F > 3.01
Customer: replied 3 years 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/

Sorry, i used the previous table

wait a minute

a) F > 1.87

Let me know...
Customer: replied 3 years ago.

Correct

Identify the test statistics, F.

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

F = 1.63

Customer: replied 3 years ago.

Correct

Identify the p-value.

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

p = 0.153

Customer: replied 3 years 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.

option b)

I posted the question some minutes ago....but i do not see it
Customer: replied 3 years ago.

Great are you ready 13 with 11 parts?

Oh yes !! i hope short parts

I am doing the first one

Customer: replied 3 years 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

Ok, thanks

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

Thanks
Customer: replied 3 years 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

option c)

Customer: replied 3 years 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>?

b) F > 2.31

Let me know...
Customer: replied 3 years 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

F = 12

Let me know...
Customer: replied 3 years 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)

Ok,

p = 0.000

Customer: replied 3 years 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

ok,

option b)
Customer: replied 3 years 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)

Ok,

F = 38.28

Customer: replied 3 years 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

p = 0.000

next...
Customer: replied 3 years 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.

Ok,

option c)
Customer: replied 3 years 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)

Ok,

Customer: replied 3 years ago.

p-value

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

Ok,

Customer: replied 3 years 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.

do you know the value of alpha ? ( a = ...)

Thanks
Customer: replied 3 years ago.

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

Yes, that`s ok

Customer: replied 3 years 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

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 3 years ago.

great 15?

Yes,

15)

all correlations are positive and i think they are weak

So

Part a) B

Let me know....
Customer: replied 3 years ago.

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

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

r²=0.0841
Customer: replied 3 years 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

option b)

Let me know...
Customer: replied 3 years 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

Ok,

Customer: replied 3 years 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)

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Steve, Teacher
Category: Homework
Satisfied Customers: 7610
Experience: I teach Calculus and Probability in a University since 1994
Customer: replied 3 years 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.

option a)

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

How much bonus can you add ?

Thanks
Customer: replied 3 years ago.

would \$50 bonus be ok?

Oh i thought you talked about \$100 but that was a total of \$100 ?

In that case \$50 is ok

Thanks
Customer: replied 3 years ago.

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

Thanks for all, next time you can request me writing "For Steve"

Tnanks again and have a good night

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