In a hypothesis test with hypotheses Ho : µ < 45 and H1 : µ > 45, a random sample of 66 elements selected from the populationproduced a mean of 47.2. Assume that o = 6.9, and that the test is to be made at the 2.5% significance level.What is the critical value of z?O -1.96Ο 1.96O 1.65O -1.65What is the value of the test statistic, z, rounded to three decimal places?iWhat is the p-value for this hypothesis test, rounded to four decimal places?iShould you reject or fail to reject the null hypothesis in this test?

Given : sample size, n = 66 sample mean, x̄ = 47.2

Answered: What is the critical value of z? O…

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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Use technology to find the P-value for the hypothesis test described below. The claim is that for a smartphone carrier's data speeds at airports, the mean is u = 15.00 Mbps. The sample size is n = 20 and the test statistic is t= 2.079. P-value = (Round to three decimal places as needed.)
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You wish to test the following claim (Ha) at a significance level of a problem, d set represents a post-test. (Each row represents the pre and post test scores for an individual. Be careful when you enter your data and specify what your 1 and x2 are so that the differences are computed correctly.) 0.005. For the context of this PostTest - PreTest where the first data set represents a pre-test and the second data H.: Pd = 0 Ha: Hd 7 0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain the following sample of data: pre-test post-test 62.1 107.3 36.7 49 43.3 60.1 46.2 25.5 55.7 98.5 46 18 38.1 15.4 49.3 63.8 43 -16.8 45.7 52.8 40.6 64.8 40.3 71.8 48.8 40.6 33.9 84.7 52.1 57.2 40.3 34.9 49.5 56.6 48.5 63 38.8 37.2 35.5 47.2 126.9
c only please
Identify the claim and state Ho and H Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed, and whether to use a z-test, a t-test, or a chi-square test. Explain your reasoning. Find the critical value(s), identify the rejection region(s), and find the appropriate standardized test statistic. Decide whether to reject or fail to reject the null hypothesis. Interpret the decision in the context of the original claim. A government agency reports that the mean amount of earnings for full-time workers ages 25 to 34 with a master’s degree is less than $70,000. In a random sample of 15 full-time workers ages 25 to 34 with a master’s degree, the mean amount of earnings is $66,231 and the standard deviation is $5945. At α = 0.05, is there enough evidence to support the agency’s claim? Assume the population is normally distributed.

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What is the critical value of z? O -1.96 O 1.96 O 1.65 O -1.65 What is the value of the test statistic, z, rounded to three decimal places? What is the p-value for this hypothesis test, rounded to four decimal places? i Should you reject or fail to reject the null hypothesis in this test?