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1. State the claim mathematically. Then write the null and…

1. State the claim mathematically. Then...
1. State the claim mathematically. Then write the null and alternative hypothesis. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed
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6/29/2010
abozer
Category: Math Homework
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Customer reply replied 8 years ago
  • 1. State the claim mathematically. Then write the null and alternative hypothesis. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. . A research hospital claims that more than 3.7% of the population suffers from high blood pressure. Use p, the represent the population proportion. (4 points)

 

Answer: Claim:

H0 :

Ha :

Test :

 

b. The highest acceptable level of pesticide found in quail has been limited to 0.35 parts per million (ppm). A hypothesis test is perform to test if the level of the pesticide is higher. (4 points)

Answer: Claim:

H0 :

Ha :

Test :

 

 

Section 7.2: Hypothesis Testing for the Mean (Large Samples)

Use the guidelines at the end of the project.

 

  • 2. Use the method specified to perform the hypothesis test for the population

mean m. WeatherBug say that the mean daily high for December in a large Florida city is F. WFLA weather suspects that this temperature is not accurate. A hypothesis test is performed the determine if the mean is actually lower than F. Assume that the population standard deviation of s = F. A sample of mean daily temperatures for December over the past 40 years gives F. At a = 0.01, does the data provide sufficient evidence to conclude that the mean temperature is lower than F.

 

a. Use the critical value z0 method from the normal distribution.

(References: example 7 though 10 pages 385 - 388, end of section exercises 39 - 44 pages 392 - 393) (6 points)

 

1. H0 :

Ha :

2. a =

3. Test statistics:

4. P-value or critical z0 or t0.

5. Rejection Region:

6. Decision:

7. Interpretation:

 

 

b. Use the P-value method.

(References: example 1 though 5 pages 379 - 383, end of section exercises 33 - 38 pages 391 - 392) (6 points)

 

 

1. H0 :

Ha :

2. a =

3. Test statistics:

4. P-value or critical z0 or t0.

5. Rejection Region:

6. Decision:

7. Interpretation:

Section 7.3: Hypothesis Testing for Mean (Small Samples)

 

  • 3. A local tire store suspects that the mean life of a new discount tire is less that 39,000 miles. To check the claim, the store selects randomly 18 of these new discount tires. When they are tested, it is found that the mean life is 38,250 miles with a sample standard deviation s = 1200 miles. Assume the distribution is normally distributed.

a. Use the critical value t0 method from the normal distribution to test for the population mean m. Test the company's claim at the level of significance a = 0.05.

(References: example 1 though 5 pages 397 - 401, end of section exercises 23 - 28 pages 404 - 405) (6 points)

 

 

1. H0 :

Ha :

2. a =

3. Test statistics:

4. P-value or critical z0 or t0.

5. Rejection Region:

6. Decision:

7. Interpretation:

 

 

 

b. Use the critical value t0 method from the normal distribution to test for the population mean m. Test the company's claim at the level of significance a = 0.01

(References: example 1 though 5 pages 397 - 401, end of section exercises 23 - 28 pages 404 - 405) (6 points)

 

 

1. H0 :

Ha :

2. a =

3. Test statistics:

4. P-value or critical z0 or t0.

5. Rejection Region:

6. Decision:

7. Interpretation:

 

 

Section 7.4: Hypothesis Testing for Proportions.

 

(References: examples 1 through 3 pages 408 - 410, end of section exercises 9 - 14 pages 411 - 412) (8 points)

 

 

1. H0 :

Ha :

2. a =

3. Test statistics:

4. P-value or critical z0 or t0.

5. Rejection Region:

6. Decision:

Interpretation:
Please post these questions separately. It is underpriced for a single post.
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Customer reply replied 8 years ago

Was not sure How to do it. So you need me to post each one and charge it $9 each right

You can do so.
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Customer reply replied 8 years ago
A local tire store suspects that the mean life of a new discount tire is less that 39,000 miles. To check the claim, the store selects randomly 18 of these new discount tires. When they are tested, it is found that the mean life is 38,250 miles with a sample standard deviation s = 1200 miles. Assume the distribution is normally distributed.

 

a. Use the critical value t0 method from the normal distribution to test for the population mean m. Test the company's claim at the level of significance a = 0.05.

(References: example 1 though 5 pages 397 - 401, end of section exercises 23 - 28 pages 404 - 405) (6 points)

 

 

1. H0 :

Ha :

2. a =

3. Test statistics:

4. P-value or critical z0 or t0.

5. Rejection Region:

6. Decision:

 

7. Interpretation:

1.

H0 : μ ≥ 39,000

Ha : μ < 39,000

2. a = 0.05

3. Test statistics: -2.652

4. P-value or critical z0 or t0. Critical t0 = -1.74

5. Rejection Region: Reject H0 if t < -1.74

6. Decision:Reject H0

 

7. Interpretation: We have sufficient evidence to conclude that the mean life of a new discount tire is less than 39,000.

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Customer reply replied 8 years ago

(References: examples 1 through 3 pages 408 - 410, end of section exercises 9 - 14 pages 411 - 412) (8 points)

 

 

1. H0 :

Ha :

2. a =

3. Test statistics:

4. P-value or critical z0 or t0.

5. Rejection Region:

 

6. Decision:

Interpretation:
Hi,

1.

H0: p ≤ 0.03

Ha: p > 0.03

2. a =0.01

3. Test statistics: 2.945

4. P-value or critical z0 or t0. Critical z is 2.326

5. Rejection Region: Reject Ho if z > 2.326

6. Decision: Reject Ho

Interpretation: We have sufficient evidence to conclude that the defective rate exceeds 3%
abozer
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Satisfied Customers: 6,159
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Customer reply replied 8 years ago
Use the method specified to perform the hypothesis test for the population

mean m. WeatherBug say that the mean daily high for December in a large Florida city is F. WFLA weather suspects that this temperature is not accurate. A hypothesis test is performed the determine if the mean is actually lower than F. Assume that the population standard deviation of s = F. A sample of mean daily temperatures for December over the past 40 years gives F. At a = 0.01, does the data provide sufficient evidence to conclude that the mean temperature is lower than F.

 

a. Use the critical value z0 method from the normal distribution.

(References: example 7 though 10 pages 385 - 388, end of section exercises 39 - 44 pages 392 - 393) (6 points)

 

1. H0 :

Ha :

2. a =

3. Test statistics:

4. P-value or critical z0 or t0.

5. Rejection Region:

 

6. Decision:

7. Interpretation:

 

 

b. Use the P-value method.

(References: example 1 though 5 pages 379 - 383, end of section exercises 33 - 38 pages 391 - 392)

 

1. H0 :

Ha :

2. a =

3. Test statistics:

4. P-value or critical z0 or t0.

5. Rejection Region:

6. Decision:

7. Interpretation:

Customer reply replied 8 years ago
I have not heard anything from anyone about the above question. I was wondering what was going on with it
Hi,

The numbers are missing. What is the mean?
Ask Your Own Math Homework Question
Customer reply replied 8 years ago

Section 7.2: Hypothesis Testing for the Mean (Large Samples)

Use the guidelines at the end of the project.

 

  • 1. Use the method specified to perform the hypothesis test for the population mean m. WeatherBug say that the mean daily high for December in a large Florida city is 76 degrees F. WFLA weather suspects that this temperature is not accurate. A hypothesis test is performed the determine if the mean is actually lower than 76 degrees F. Assume that the population standard deviation of s =5.6degrees F. A sample of mean daily temperatures for December over the past 40 years gives x=74 degrees F. At a = 0.01, does the data provide sufficient evidence to conclude that the mean temperature is lower than 76 degrees F.

 

a. Use the critical value z0 method from the normal distribution.

(References: example 7 though 10 pages 385 - 388, end of section exercises 39 - 44 pages 392 - 393)

 

•1. H0 :

Ha :

•2. a =

•3. Test statistics:

•4. P-value or critical z0 or t0.

•5. Rejection Region:

•6. Decision:

•7. Interpretation:

 

 

  • b. Use the P-value method.

(References: example 1 though 5 pages 379 - 383, end of section exercises 33 - 38 pages 391 - 392)

 

 

•1. H0 :

Ha :

•2. a =

•3. Test statistics:

•4. P-value or critical z0 or t0.

•5. Rejection Region:

•6. Decision:

•7. Interpretation:

Here is the solution.


•1.

H0 : μ ≥ 76

Ha : μ < 76

•2. a =0.01

•3. Test statistics: -2.259

•4. P-value or critical z0 or t0. zo = -2.326

•5. Rejection Region: Reject Ho if z < -2.326

•6. Decision: Cannot Reject Ho

•7. Interpretation: We don't have sufficient evidence to conclude that the mean temperature is lower than 76 degrees F.

 

  • b. Use the P-value method.

•1.

H0 : μ ≥ 76

Ha : μ < 76

•2. a = 0.01

•3. Test statistics: -2.259

•4. P-value or critical z0 or t0. p-value = 0.0119

•5. Rejection Region: Reject Ho if p-value < 0.01

•6. Decision: Cannot Reject Ho

•7. Interpretation: We don't have sufficient evidence to conclude that the mean temperature is lower than 76 degrees F.

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Customer reply replied 8 years ago

#25 a microwave oven repairer says that the mean repair cost for damaged microwave ovens is less than $90. You work for the repairer and want to test this claim. You find that a random sample of five microwave ovens has a mean repair cost of $95 and a standard deviation of $12 at a=0.10 do you have enough evidence to support the repairer claim. assum the population is normally distrubuted

 

HO=

HA=

to=

 

To left, right or two sided =

find the standized test t= (round 3 dec places as needed)

Deciide wither reject, fail to reject the null=

Interpret

 

Hi,

HO= μ ≥ 90

HA= μ < 90

to= -1.533

 

To left, right or two sided = left tailed

find the standized test t= 0.932 (round 3 dec places as needed)

Decide wither reject, fail to reject the null= fail to reject

Interpret: We don't have sufficient evidence to support the claim that the mean repair cost for damaged microwave ovens is less than $90.

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Customer reply replied 8 years ago

The population mean and standard deviaton are given below. Find the required probabilty and determine whether the given sample mean would be considered unusual For a sample of n=65 find the probabilty of a sample mean being greater than 226 if mean=225 and standard deviation=3.7 is ___(round four decimal)

Would the given sample mean be considered unusaual?__

The sample mean would/would not be considered unusual b/c it lie or does not lie with in 1 standared 2 standard or 3 standard deviations

The probabilty of a sample mean being greater than 226 if mean=225 and standard deviation=3.7 is 0.0147 ___(round four decimal)

Would the given sample mean be considered unusaual?__ Yes.

The sample mean would/would not be considered unusual b/c it lie or does not lie with in 1 standared 2 standard or 3 standard deviations

abozer
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Satisfied Customers: 6,159
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Customer reply replied 8 years ago

People were polled on how many books they read the previous year. How many subjects are needed to estimate the number of books read the previous year with in one book with 99% confidence? Initial survey results indicate that standard deviation=18.9

 

A 99% confidence level requires___ subjects (round up to nearest whole number

Hi again,

n ≥ (z*σ/E)^2

n ≥ (2.576*18.9/1)^2

n ≥ 2370.4

n = 2371
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Customer reply replied 8 years ago

P(A)=0.34 P(B)-0.22 P(c)-0.15

P(A and B)=0.12, P(A and C)-0.02, P(BandC= 0.07

P(A and B and C)= 0.01

 

P(A or B or C) = ____

P(A or B or C) = P(A) + P(B) + P(C) - P(A and B) - P(A and C) - P(B and C) + P(A and B and C)

= 0.34 + 0.22 + 0.15 - 0.12 - 0.02 - 0.07 + 0.01

= 0.51
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