Homework Answers
Let 
denotes the true mean delivery time.
To test 
against 
Here
sample mean 
sample standard deviation 
and sample size 
The rejection region is : 
or 
e) P(Type II Error)
= P(Accept H0 when H0 is not true)
(ans)
Add Answer to:
Solve only part E
(10 pts) In an advertisement, a pizza shop claims that its mean...
(10 pts) In an advertisement, a pizza shop claims that its mean delivery time is less...
(10 pts) In an advertisement, a pizza shop claims that its mean delivery time is less than 30 minutes. A random sample of 36 delivery imes has a mean of 28.5 minutes and a standard deviation of 3.5 minutes. Is there enough evidence to support the claim at α-.05 ? (a) Set up the null and alternative hypotheses (b) Find the test statistic. (c) Find the rejection region and state your conclusion. (d) What is the P-value for this test?
Just need e (10 pts) In an advertisement, a pizza shop claims that its mean delivery...
Just need e
(10 pts) In an advertisement, a pizza shop claims that its mean delivery time is less thai 30 A aopleof 36 delivry of 28.5 mim ELAL and a standard deviation of 3.5 minutes. Is there enough evidence to support the claim at a -.05? e) Find the probability of type II error when the true mean is 29.
In a advertisement, a pizza shop claims that its mean delivery time is less than 20...
In a advertisement, a pizza shop claims that its mean delivery time is less than 20 minutes. of A random selection 50 delivery times has a sample mean of 22 minutes and a standard deviation of 2.1 minutes. Is there enough evidence to support the claim at = 0.005. Find: Question 5 The null hypothesis ( H0) 22 min 22 min 20 min 20 min Question 6 The alternative hypothesis ( H0) 22 min 20 min 22 min 20 min...
In an advertisement, a pizza shop claims that its mean delivery time is no more than...
In an advertisement, a pizza shop claims that its mean delivery time is no more than 30 minutes. A random selection of 36 delivery times has a sample mean of 31.5 minutes. Assume the population standard deviation is 3.5 minutes and alpha is 0.02. ved Answer the following using the classical approach for hypothesis testing. Indicate the symbol in the Ha statement. Calculate the test statistic, z'. Is the critical region(s) left tailed, right tailed, or two tailed? As What...
A pizza place recently hired additional drivers and as a result now claims that its average...
A pizza place recently hired additional drivers and as a result now claims that its average delivery time for orders is un minutes. Historically, the standard deviation for delivery time is 11.6 minutes. Using a = 0.01, complete parts a and bb a. Does this sample provide enough evidence to support the delivery time claim made by the pizza place? Determine the null and alternative hypotheses. Ho: H, :μ The Z-test statistic is (Round to two decimal places as needed.)...
An industrial company claims that the mean PH level of the water in a nearby river...
An industrial company claims that the mean PH level of the water in a nearby river is 6.8. You randomly selected 16 water samples and measure the PH of each. The sample mean and standard deviation are 6.7 and 0.24, respectively. Is there enough evidence to reject the company's claim at 05? Assume the population is normally distributed. Set up appropriate hypotheses, calculate your test statistic, find the rejection region or P-value and make the final conclusion.
A pizza place recently hired additional drivers and as a result now claims that its average...
A pizza place recently hired additional drivers and as a result now claims that its average delivery time for orders is under 45 minutes. A sample of 43 customer deliveries was examined, and the average delivery time was found to be 41.8 minutes. Historically, the standard deviation for delivery time is 10.8 minutes. Using a=0.10, complete parts a and b below. a. Does this sample provide enough evidence to support the delivery time claim made by the pizza place? Determine...
A travel analyst claims that the mean price of a round trip flight from New York...
A travel analyst claims that the mean price of a round trip flight from New York City to Los Angeles is less than $507. In a random sample of 28 round trip flights from New York City to Los Angeles, the mean price is $502 with a standard deviation of $111. At α = 0.10, is there enough evidence to support the travel analyst’s claim? Identify the null and alternative hypotheses and label the claim. State whether to use a...
Question Help A company claims that the mean monthly residential electricity consumption in a certain region...
Question Help A company claims that the mean monthly residential electricity consumption in a certain region is more than 870 kiloWatt-hours (kWh). You want to test this claim. You findt t sample of 64 esidential customers has a mean monthly consumption of 890 kWh with a standard deva on of 129 kWh. At α-Ο 10, can you supp he claim? Complete parts (a) through (e). a random O A. The rejection region is z < 1.28. O B. The rejection...
e / Study / A company claims that the mean monthly residential electricity consumption in a...
e / Study / A company claims that the mean monthly residential electricity consumption in a certain region is more than 870 kilowatt-hours (kWh). You want to test this claim You find that a random sample of 68 residential customers has a mean monthly consumption of 890 kWh. Assume the population standard deviation is 125 kWh Ala010 can you support the claim? Complete parts (a) through (e) jestio (a) Identify Ho and H. Choose the correct answer below w transcribe...
(10 pts) In an advertisement, a pizza shop claims that its mean delivery time is less than 30 minutes. A random sample of 36 delivery imes has a mean of 28.5 minutes and a standard deviation of 3.5 minutes. Is there enough evidence to support the claim at α-.05 ? (a) Set up the null and alternative hypotheses (b) Find the test statistic. (c) Find the rejection region and state your conclusion. (d) What is the P-value for this test?
Just need e
(10 pts) In an advertisement, a pizza shop claims that its mean delivery time is less thai 30 A aopleof 36 delivry of 28.5 mim ELAL and a standard deviation of 3.5 minutes. Is there enough evidence to support the claim at a -.05? e) Find the probability of type II error when the true mean is 29.
In an advertisement, a pizza shop claims that its mean delivery time is no more than 30 minutes. A random selection of 36 delivery times has a sample mean of 31.5 minutes. Assume the population standard deviation is 3.5 minutes and alpha is 0.02. ved Answer the following using the classical approach for hypothesis testing. Indicate the symbol in the Ha statement. Calculate the test statistic, z'. Is the critical region(s) left tailed, right tailed, or two tailed? As What...
A pizza place recently hired additional drivers and as a result now claims that its average delivery time for orders is un minutes. Historically, the standard deviation for delivery time is 11.6 minutes. Using a = 0.01, complete parts a and bb a. Does this sample provide enough evidence to support the delivery time claim made by the pizza place? Determine the null and alternative hypotheses. Ho: H, :μ The Z-test statistic is (Round to two decimal places as needed.)...
An industrial company claims that the mean PH level of the water in a nearby river is 6.8. You randomly selected 16 water samples and measure the PH of each. The sample mean and standard deviation are 6.7 and 0.24, respectively. Is there enough evidence to reject the company's claim at 05? Assume the population is normally distributed. Set up appropriate hypotheses, calculate your test statistic, find the rejection region or P-value and make the final conclusion.
A pizza place recently hired additional drivers and as a result now claims that its average delivery time for orders is under 45 minutes. A sample of 43 customer deliveries was examined, and the average delivery time was found to be 41.8 minutes. Historically, the standard deviation for delivery time is 10.8 minutes. Using a=0.10, complete parts a and b below. a. Does this sample provide enough evidence to support the delivery time claim made by the pizza place? Determine...
Question Help A company claims that the mean monthly residential electricity consumption in a certain region is more than 870 kiloWatt-hours (kWh). You want to test this claim. You findt t sample of 64 esidential customers has a mean monthly consumption of 890 kWh with a standard deva on of 129 kWh. At α-Ο 10, can you supp he claim? Complete parts (a) through (e). a random O A. The rejection region is z < 1.28. O B. The rejection...
e / Study / A company claims that the mean monthly residential electricity consumption in a certain region is more than 870 kilowatt-hours (kWh). You want to test this claim You find that a random sample of 68 residential customers has a mean monthly consumption of 890 kWh. Assume the population standard deviation is 125 kWh Ala010 can you support the claim? Complete parts (a) through (e) jestio (a) Identify Ho and H. Choose the correct answer below w transcribe...
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