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MATLAB: An Introduction with Applications
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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hello, can you help me with the last two questions please?

To test Hō: μ = 20 versus H₁: μ<20, a simple random sample of size n = 17 is obtained from a population that is known to be normally distributed. Answer parts (a)-(d). Click here to view the t-Distribution Area in Right Tail. (a) If x= 18.2 and s= 3.9, compute the test statistic. t = -1.90 (Round to two decimal places as needed.) (b) Draw a t-distribution with the area that represents the P-value shaded. Which of the following graphs shows the correct shaded region? O A. O B. A (c) Approximate the P-value. Choose the correct range for the P-value below. O A. 0.15 < P-value <0.20 O B. 0.05<P-value < 0.10 OC. 0.025<P-value < 0.05 O D. 0.10 < P-value < 0.15 A (d) If the researcher decides to test this hypothesis at the a= 0.05 level of significance, will the researcher reject the null hypothesis? O A. The researcher will not reject the null hypothesis since the P-value is less than a. O B. The researcher will reject the null hypothesis since the P-value is less than a O C. The researcher will not reject the null hypothesis since the P-value is not less than . O D. The researcher will reject the null hypothesis since the P-value is not less than a. C O C.
Transcribed Image Text:To test Hō: μ = 20 versus H₁: μ<20, a simple random sample of size n = 17 is obtained from a population that is known to be normally distributed. Answer parts (a)-(d). Click here to view the t-Distribution Area in Right Tail. (a) If x= 18.2 and s= 3.9, compute the test statistic. t = -1.90 (Round to two decimal places as needed.) (b) Draw a t-distribution with the area that represents the P-value shaded. Which of the following graphs shows the correct shaded region? O A. O B. A (c) Approximate the P-value. Choose the correct range for the P-value below. O A. 0.15 < P-value <0.20 O B. 0.05<P-value < 0.10 OC. 0.025<P-value < 0.05 O D. 0.10 < P-value < 0.15 A (d) If the researcher decides to test this hypothesis at the a= 0.05 level of significance, will the researcher reject the null hypothesis? O A. The researcher will not reject the null hypothesis since the P-value is less than a. O B. The researcher will reject the null hypothesis since the P-value is less than a O C. The researcher will not reject the null hypothesis since the P-value is not less than . O D. The researcher will reject the null hypothesis since the P-value is not less than a. C O C.
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