Questions 1-9. 25 new mothers were investigated about their sleeping hours per day before and after having a baby. Researchers want to know if new mothers’ sleeping hours have been significantly reduced. Sample average and sample standard deviation of D (before - after) are computed as 2.5 and 4. Please test this hypothesis at 5% significance level and calculate the p-value.
Question 1. Set up the hypothesis H0.
Group of answer choices
H0: mud = 0, H1 : mud > 0
H0: mud > 0, H1 : mud < 0
H0: mud < 0, H1 : mud = 0
H0: mud < 0, H1 : mud > 0
Questions 1-9. 25 new mothers were investigated about their sleeping hours per day before and after having a baby. Researchers want to know if new mothers’ sleeping hours have been significantly reduced. Sample average and sample standard deviation of D (before - after) are computed 2.5 and 4. Please test this hypothesis at 5% significance level and calculate the p-value.
Question 2. Calculate the t-test statistics.
Group of answer choices
0.24
3.13
1.71
0.95
Questions 1-9. 25 new mothers were investigated about their sleeping hours per day before and after having a baby. Researchers want to know if new mothers’ sleeping hours have been significantly reduced. Sample average and sample standard deviation of D (before - after) are computed 2.5 and 4. Please test this hypothesis at 5% significance level and calculate the p-value.
Question 3. Find the degree of freedom.
Group of answer choices
24
25
1
4