C. Given a and the z-values. Indicate whether the decision is to reject the null hypothesis or accept the null hypothesis for each of the following. Use a = .05 8. a – 0.05, z = 2.5, two-tailed 9. a – 0.05, z = -1.645, one-tailed 10. a – 0.01, z = -3.7, two-tailed

C. Given a and the z-values. Indicate whether the decision is to reject the null hypothesis or accept the null hypothesis for each of the following. Use a = .05 8. a – 0.05, z = 2.5, two-tailed 9. a – 0.05, z = -1.645, one-tailed 10. a – 0.01, z = -3.7, two-tailed

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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Q1. An anthropologist wants to collect data to determine whether the two different cultural groups that occupy an isolated Pacific Island grow to be different heights. The results of his samples of the heights of adult females are as follows Group A n = 120 X,= 62.7 Group B n = 150 X, = 61.8 S1= 2.5 S2 = 2.62 Do these samples constitute enough evidence to reject the null hypothesis that the heights of the two groups are the same? Set alpha to .05. What are the appropriate null and alternative hypothesis? A. Ho: H1- H2 = 0 H;: H1 - H2 * 0 B. Ho: H1- H2 N0 H: H-H2 0 D. Ho: H1 - H2 # 0 H: H- H2 = 0 E. None of these. 2. What is the Test statistics? A.T = X-9-Do B. Z = -9-Do C. T = -9-Do D-Do D.T = E. Z = -9-Do 1, 1 SD 1 ni'n2 n1 n2 zu Tu 3. What is the value of the test statistic? A. T = 9.20 B.T = 2.86 C.Z = 9.20 D.T = 1.44 E.None of these A TOSHIBA F6 F10 F11 F12 SNI YJU
A null and alternative hypothesis are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. H0: σ ≥ 7 Ha: σ < 7 What type of test is being conducted in this problem? A. Two-tailed test B. Left-tailed test C. Right-tailed test
Q1. An anthropologist wants to collect data to determine whether the two different cultural groups that occupy an isolated Pacific Island grow to be different heights. The results of his samples of the heights of adult females are as follows Group A n = 120 X1= 62.7 Group B n = 150 X2 = 61.8 S2 = 2.62 S1=2.5 Do these samples constitute enough evidence to reject the null hypothesis that the heights of the two groups are the same? Set alpha to .05. 5. What is the appropriate decision and conclusion? A. Reject Ho, so there is significance evidence to conclude heights of the two groups are different. B. Fail to eject Ho, so no significance evidence to conclude heights of the two groups are different. C. Fail to reject Ho, so there significance evidence to conclude: heights of the two groups are different D. Reject Ho, so no significance evidence to conclude heights of the two groups are different.
Answer last 3 parts. t hank y o u.
You are conducting a multinomial hypothesis test (α= 0.05) for the claim that all 5 categories are equally likely to be selected. Complete the table. Category ObservedFrequency ExpectedFrequency A 17 B 22 C 11 D 13 E 17 Report all answers accurate to three decimal places. But retain unrounded numbers for future calculations.What is the chi-square test-statistic for this data? (Report answer accurate to three decimal places, and remember to use the unrounded Pearson residuals in your calculations.)χ2= What are the degrees of freedom for this test?d.f.= What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value = Is the p-value less than αα? yes no This test statistic leads to a decision to... reject the null accept the null fail to reject the null accept the alternative As such, the final conclusion is that... There is sufficient evidence to warrant rejection of the claim that all 5 categories are equally likely to…
For (15) – (23) identify the IV, DV, and the correct hypothesis test to run. Then conduct the hypothesis test based on the instructions given with each item. 15. A researcher for a cereal company wanted to demonstrate the health benefits of eating oatmeal. A sample of 9 volunteers was obtained and each participant at a fixed diet without any oatmeal for 30 days. At the end of the 30-day period, cholesterol was measured for each individual. Then participants began a second 30-day period in which they repeated exactly the same diet except they added 2 cups of oatmeal each day. After the second 30-day period, cholesterol levels were measured again and the researcher recorded the difference between the two scores for each participant. For this sample, cholesterol scores averated M = 16 points lower with the oatmeal diet with SS = 538 for the difference scores. a. Are the data sufficient to indicate a significant change in cholesterol level? Test %3D %3D with α.01. %3D b. Compute estimated…
.6-1 Assigned Medla Use technology to find the P-value for the hypothesis test described below. The claim is that for 12 AM body temperatures, the mean isp>98.6°F The sample size is n=4 and the test statistic is t= 2.446. P-value=(Rbund to three decimal places as needed.) (1,1) More Enter your answer in the answer box and then click Check Answer. Clear All Final Check All parts showing Con Copyright 2021 Pearson Education Inc. All rights reserved . Terms of Use | Privacy Policy Permissions e to search DEEL
Suppose that we reject a null hypothesis at the 0.1 level of significance. Then for which of the following a- values do we also reject the null hypothesis? O A. 0.002 ОВ. 0.02 ОС. 0.01 D. 0.2 E. 0.001
You collect N = 200 frogs from a pond and find that 120 of them are female. You wish to conduct the following hypothesis test (α = 0.05) for p (the proportion of female frogs in the pond): H0 : p = 0.55 HA : p > 0.55 Determine which of the following statements are true. Assume the true p = 0.65. I. The one-sided p-value is 0.1528. II. You reject the null hypothesis H0. III. You fail to reject H0 and make a Type II error. Group of answer choices I and III only III only I only None of the Above II only
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You collect N = 200 frogs from a pond and find that 120 of them are female. You wish to conduct the following hypothesis test (α = 0.05) for p (the proportion of female frogs in the pond): H0 : p = 0.55 HA : p > 0.55 Determine which of the following statements are true. Assume the true p = 0.65. I. The one-sided p-value is 0.1528. II. You reject the null hypothesis H0. III. You fail to reject H0 and make a Type II error. Group of answer choices None of the Above III only I and III only II only I only
Q1. An anthropologist wants to collect data to determine whether the two different cultural groups that occupy an isolated Pacific Island grow to be different heights. The results of his samples of the heights of adult females are as follows Group A n = 120 Group B n= 150 X,= 62.7 X, = 61.8 S1= 2.5 S2 = 2.62 Do these samples constitute enough evidence to reject the null hypothesis that the heights of the two groups are the same? Set alpha to .05. 1. What are the appropriate null and alternative hypothesis? A. Ho: µ1 – µ2 # 0_H;:µ1 – Hz = 0 B. Họ: H1 – H2 >0 H;: H4 – Hz 0 D. Ho: µ1 – µ2 = 0 H;: µ1 – H2 # 0 E. None of these. 2. What is the Test statistics? A. Z = x-y-Do В. Z %3D x-y-Do C. T = -y-Do D.T = D-Do E. T = x-y-Do 1 Sp +- Vn1 'n2 SD n1 n2 n1 n2 n1 n2 3. What is the value of the test statistic? A. T = 2.82 B.T = 9.20 C.Z = 9.20 D.T = 1.44 E.None of these 4. For a significance level of 0.05, what is the critical value? A. Z0.05 = 1.645 B.to.025 = 1.960 C. to.05 = 1.645 D.zo.025 =…