Asked by Sonia Nelson on Jun 27, 2024

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A university wants to increase its retention rate of 4% for graduating students from the previous year.After implementing several new programs during the last two years,the university reevaluated its retention rate using a random sample of 352 students and found the retention rate at 5%.Test an appropriate hypothesis and state your conclusion.Be sure the appropriate assumptions and conditions are satisfied before you proceed.

A) H0\mathrm { H } _ { 0 }H0 : p = 0.04; HA\mathrm { H } _ { \mathrm { A } }HA : p > 0.04; z = 0.96; P-value = 0.1685.This data shows virtually no evidence that more than 4% of students are retained; the university should not continue with the new programs.
B) H0\mathrm { H } _ { 0 }H0 : p = 0.04; HA\mathrm { H } _ { \mathrm { A } }HA : p < 0.04; z = 1.07; P-value = 0.8577.This data shows conclusive evidence that more than 4% of students are retained; therefore,the university should continue with the new programs.
C) H0\mathrm { H } _ { 0 }H0 : p = 0.04; HA\mathrm { H } _ { \mathrm { A } }HA : p < 0.04; z = -1.07; P-value = 0.8577.This data shows conclusive evidence that more than 4% of students are retained; the university should continue with the new programs.
D) H0\mathrm { H } _ { 0 }H0 : p = 0.04; HA\mathrm { H } _ { \mathrm { A } }HA : p > 0.04; z = -1.07; P-value = 0.1423.This data does not show that more than 4% of students are retained; the university should not continue with the new programs.
E) H0\mathrm { H } _ { 0 }H0 : p = 0.04; HA\mathrm { H } _ { \mathrm { A } }HA : p ? 0.04; z = 1.07; P-value = 0.2846.This data shows virtually no evidence that more than 4% of students are retained; the university should not continue with the new programs.

Retention Rate

The percentage of individuals or items that remain in a group over a specified period, often used to measure customer loyalty or the effectiveness of educational programs.

Hypothesis

A proposed explanation for a phenomenon, made as a starting point for further investigation.

P-value

A statistical measure that indicates the probability of the observed data given a specific hypothesis is true.

  • Attain a comprehension of the hypothesis testing procedure, particularly in formulating null and alternative hypotheses.
  • Master the concept and interpretation of P-values within hypothesis testing.
  • Understand the suitable hypothesis testing approaches for varying contexts and data types.
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DJ
Dominik JordanJul 03, 2024
Final Answer :
A
Explanation :
The null hypothesis ( H0\mathrm { H } _ { 0 }H0 ) correctly states the retention rate is 4% (p = 0.04), and the alternative hypothesis ( HA\mathrm { H } _ { \mathrm { A } }HA ) correctly aims to prove an increase (p > 0.04). The P-value of 0.1685 indicates insufficient evidence to reject the null hypothesis, suggesting the programs may not have significantly increased the retention rate.