9. [24/396, o Unknown] Consider the following hypothesis test: Ho: u = 18 and Ha: u ‡ 18. Asample of 48 provided a sample mean, x of 17 and a population standard deviation, s = 4.5a. Compute the value of the test statistic.b. Use the t distribution table to compute a range for the p - value.c. At a = 0.05, what is your conclusion?d. What is the rejection rule using the critical value? What is your conclusion?

It is given that, The sample size is 48. The sample mean is 17. The sample standard deviation is…

Answered: 9. [24/396, ♂ Unknown] Consider the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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When consumers apply for credit cards, their credit is rated using FICO scores. A random sample of creditratings is obtained, and the FICO scores are summarized with these statistics: n=35, �̅= 660.3, s=95.9.Use � = 0.05 and conduct a two-tailed hypothesis test to test the claim that the mean credit score (of thegeneral population) is equal to 700.d) Make a sketch of the distribution indicating the t test statistic and the p-value.e) In the context of the problem, write a conclusion to the study
19. Consider the following hypothesis test:H0: μ = 22Ha: μ ≠ 22A sample of 75 is used and the population standard deviation is 10. At α equal to 0. 01, compute the P value and state your conclusion for each of the following sample results.a) ? =23b) ? = 25.1c) ? =20
A random sample of n= 4 individuals is selected from a population with μ = 35, and a treatment is administered to each individual in the sample. After treatment, the sample mean is found to be M = 40.1 with SS = 48. How much difference is there between the mean for the treated sample and the mean for the original population? (Note: In a hypothesis test, this value forms the numerator of the t statistic.) If there is no treatment effect, how much difference is expected between the sample mean and its population mean? That is, find the standard error for M. (Note: In a hypothesis test, this value is the denominator of the t statistic.) Based on the sample data, does the treatment have a significant effect? Use a two-tailed test with α = .05.
A random sample of n=4 individuals is selected from population with µ = 35, and a treatment is administered to each individual in the sample. After treatment, the sample mean is found to be M= 40. 1 with SS= 48. a. How much difference is there between the mean for the treated sample and the mean for the original population?(note: In a hypothesis test, this value forms the numerator of the t statistic.) b. If there is no treatment effect, how much difference is expected between the sample mean and its population mean? That is, find the standard the standard error for M. (note: in a hypothesis test, this value is the denominator of the t statistic.) c. Based on the sample data, does the treatment have a significant effect? Use a two-tailed test with α=.05.
A random sample of n = 25 individuals is selected from a population with μ = 20, and a treatment is administered to each individual in the sample. After treatment, the sample mean is found to be M = 22.2 with SS = 384. a. How much difference is there between the mean for the treated sample and the mean for the original population? (Note: In a hypothesis test, this value forms the numerator of the t statistic.) c. Based on the sample data, does the treatment have a significant effect? Use a two-tailed test with α = .05.
23. The State of California claims the population average of the amount of ice cream each Californian eats in the month of September is 6.85 pints with population standard deviation of 1.35 pints. An SRS of 500 Californians resulted in a sample average of 6.75 pints eaten per person in the month of September At alpha = 0.05 , is there evidence to support the State of California's claim that Californians eat an average of 6.85 pints of ice cream in the month of September? Find the p-value ?

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