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It has been known that around 75% of students enrolled in Elementary Statistics in a certain university pass this course. A sample of 35 students were randomly selected from the current student list who took Elementary Statistics this semester, and 28 of them passed the course. Is there sufficient evidence at 5% level of significance to claim that this historical percentage has increased in the modern times? 5.1. What are the hypotheses to be tested by the problem? OO 80 B O O O C o 5.2. What is the critical region to be considered in the test? B A. Ho: p= 0.75; H₁: p > 0.75 B. Ho: p=0.75; H₁: p < 0.75 C. Ho: $ > 0.75; H: Ô ≤ 0.75 D. Ho: < 0.75; H₁: Ô ≥ 0.75 C A. B. C. Z<-Za Z > Za |Z| > Za/2

It has been known that around 75% of students enrolled in Elementary Statistics in a certain university pass this course. A sample of 35 students were randomly selected from the current student list who took Elementary Statistics this semester, and 28 of them passed the course. Is there sufficient evidence at 5% level of significance to claim that this historical percentage has increased in the modern times? 5.1. What are the hypotheses to be tested by the problem? OO 80 B O O O C o 5.2. What is the critical region to be considered in the test? B A. Ho: p= 0.75; H₁: p > 0.75 B. Ho: p=0.75; H₁: p < 0.75 C. Ho: $ > 0.75; H: Ô ≤ 0.75 D. Ho: < 0.75; H₁: Ô ≥ 0.75 C A. B. C. Z<-Za Z > Za |Z| > Za/2

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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show all solutions note: answer only number 5.3 the question is connected to number 5)
5.3. What is the decision and conclusion for the test? For this question, use the following: Z = Y - npo √npo(1 - Po) Zo.05 = 1.645 Zo.o2s = 1.96 O Reject the null hypothesis; there is sufficient evidence to conclude that the current percentage has increased compared to the historical percentage. Do not reject the null hypothesis; there is no sufficient evidence to conclude that the current percentage has increased compared to the historical percentage. Reject the null hypothesis; there is sufficient evidence to conclude that the current percentage has decreased compared to the historical percentage. Do not reject the null hypothesis; there is no sufficient evidence to conclude that the current percentage has decreased compared to the historical percentage. Reject the null hypothesis; there is sufficient evidence to conclude that the current percentage is equal to the historical percentage. Do not reject the null hypothesis; there is no sufficient evidence to conclude that the current percentage is equal to the historical percentage.
Transcribed Image Text:5.3. What is the decision and conclusion for the test? For this question, use the following: Z = Y - npo √npo(1 - Po) Zo.05 = 1.645 Zo.o2s = 1.96 O Reject the null hypothesis; there is sufficient evidence to conclude that the current percentage has increased compared to the historical percentage. Do not reject the null hypothesis; there is no sufficient evidence to conclude that the current percentage has increased compared to the historical percentage. Reject the null hypothesis; there is sufficient evidence to conclude that the current percentage has decreased compared to the historical percentage. Do not reject the null hypothesis; there is no sufficient evidence to conclude that the current percentage has decreased compared to the historical percentage. Reject the null hypothesis; there is sufficient evidence to conclude that the current percentage is equal to the historical percentage. Do not reject the null hypothesis; there is no sufficient evidence to conclude that the current percentage is equal to the historical percentage.
5. For questions 5.1-5.3, refer to the following problem: It has been known that around 75% of students enrolled in Elementary Statistics in a certain university pass this course. A sample of 35 students were randomly selected from the current student list who took Elementary Statistics this semester, and 28 of them passed the course. Is there sufficient evidence at 5% level of significance to claim that this historical percentage has increased in the modern times? 5.1. What are the hypotheses to be tested by the problem? 0000 A B C 5.2. What is the critical region to be considered in the test? 0 0 0 B A. Ho: p= 0.75; H₁: p > 0.75 B. Họ: $ = 0.75; Hạ: p< 0.75 C. Ho: $ > 0.75; H: Ô ≤ 0.75 D. Ho: < 0.75; H₁: Ô ≥ 0.75 C A. B. C. Z<-Za Z > Za |Z| > Zα/2
Transcribed Image Text:5. For questions 5.1-5.3, refer to the following problem: It has been known that around 75% of students enrolled in Elementary Statistics in a certain university pass this course. A sample of 35 students were randomly selected from the current student list who took Elementary Statistics this semester, and 28 of them passed the course. Is there sufficient evidence at 5% level of significance to claim that this historical percentage has increased in the modern times? 5.1. What are the hypotheses to be tested by the problem? 0000 A B C 5.2. What is the critical region to be considered in the test? 0 0 0 B A. Ho: p= 0.75; H₁: p > 0.75 B. Họ: $ = 0.75; Hạ: p< 0.75 C. Ho: $ > 0.75; H: Ô ≤ 0.75 D. Ho: < 0.75; H₁: Ô ≥ 0.75 C A. B. C. Z<-Za Z > Za |Z| > Zα/2
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