A group of n = 25 students was selected at random for studiesrelated to the amount of time they spent for exam preparations.Educators assume that individual records are normally distributedwith entirely unknown parameters (μ, σ). Sample summaries (inminutes per week) were obtained as
Sample Mean =X =90 and Sample SD =s=20 For hypothesis testing,set significance level = α = 0.01̄
To test whether μ < 100, what critical value (or values) areyou going to use?
Formulate rejection rule that explains whether you are rejectingthe null hypothesis or not
Evaluate the test statistic
State your decision in the form:
Yes, we have enough evidence to reject the null hypothesis or No,we do not have evidence to reject the null hypothesis
