Question 14An accountant claims to be able to complete a standard tax return in under an hour. The manager ofthe accountant is skeptical and carries out a test to challenge the accountant's claim. For a randomsample of 24 tax returns, the accountant averaged 63.2 minutes with a standard deviation of 7.7minutes.a)What are the appropriate null and alternative hypotheses?A) H0 : μ = 60 and H1 : μ‡#60B) H0 u ≤ 60 and H1 : µ > 60:C) H0 : μ ≥ 60 and H1 : µ< 60D) H0 : μ> 60 and H1 : μ ≤ 60b)What is the test statistic for this test?A) 0.42B) 1.79C) 2.04D) None of the abovec)What can we say about the test result?A) Do not reject at the 5% level.B) Reject at the 5% level but not at the 2.5% levelC) Reject at the 2.5% level.D) None of the above.

The sample size: n=24 The sample mean: x¯=63.2 minutes The sample standard deviation: s=7.7 minutes…

Answered: Question 14 An accountant claims to be…

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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a) A recent government report claims that the average house selling price in North Wales is £196,000. In a random sample of 250 recent house sales in North Wales, the average selling price was £202,795 with a standard deviation of £36,000. (i) Test the null hypothesis that the population mean average house selling price is £196,000 against a one-sided alternative that the population mean average house selling price is more than £196,000. Use a significance level of α=0.05 (ii) Does the statistical evidence support the claim that the average house selling price in North Wales is £196,000? Explain your answer
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