MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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In testing the hypothesis H0:µ = 75 vs µ≠75, the following information is known: n = 64, X-bar = 78, and s = 10. the test statistic is equal to?
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- Find the standardized test statistic t for a sample with n = 15, x 10.4, s = 0.8, and a=0.05 if Hg u s101. Round your answer to three decimal %3D %3D places. 1.728 O1312 O 1452 1.631 Karrow_forwardA researcher develops a test for identifying intellectually gifted children. It has a μ=56 and σ=8. a. what percentage of children are expected to score above 60? b. What percentage of the scores will be below 54? *ANSWER BOTH PARTS A & B*arrow_forwardAssume we know the following for a paired-samples t test: N = 32, Mdifference = 1.75, s = 4arrow_forwardGiven the following information, n = 36, x = 60, s = 12 H0: ? ≥ 69 Ha: ? < 69 what is the test statistic?arrow_forwardThe t test for the difference between the means of two independent populations assumes that the respective Seleccione una: O A. populations are approximately normal. В. sample sizes are equal. С. sample variances are equal. O D. all of the abovearrow_forwardSuppose a one sided test for a proportion resulted in a p-value of 0.06. What would the p-value be if the test were two tail test? Select one: A. It would still be 0.06. B. It would be 0.3. C. It would be 0.12. D. There is no way to calculate this without completely redoing the original test with a new alternative hypothesis.arrow_forwardd) Using α=.05, what is tcrit?e) Given pooled variance = 8.99, Calculate tobt.f) What should Martha conclude?arrow_forwardSolve the problem. Find the standardized test statistic t for a sample with n = 15, x = 8.7, s = 0.8, and a = 0.05 if Ho: Hs 8.4. Round your answer to three decimal places. a. 1.452 b. 1.631 c. 1.728 d. 1.312arrow_forwardState the conclusion based on the results of the test. The mean of the pressure required to open a certain valve is known to be u = 6.7 psi. Due to changes in the manufacturing process, the quality-control manager feels that the average pressure has changed. The null hypothesis was rejected. Choose the correct answer below. O A. The mean of the pressure has not changed. O B. There is not sufficient evidence that the mean of the pressure required to open a certain valve has changed. O C. There is not sufficient evidence that the mean of the pressure required to open a certain valve has not changed. O D. The mean of the pressure has changed. O E. There is sufficient evidence that the mean of the pressure required to open a certain valve has changed. O F. There is sufficient evidence that the mean of the pressure required to open a certain valve has not changed.arrow_forwardarrow_back_iosarrow_forward_ios
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