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  3. a group of n = 25 students was selected at random

A group of n = 25 students was selected at random for studies related to the...

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Statistics

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

  1. To test whether μ < 100, what critical value (or values) areyou going to use?

  2. Formulate rejection rule that explains whether you are rejectingthe null hypothesis or not

  3. Evaluate the test statistic

  4. 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

Answer & Explanation Solved by verified expert
4.5 Ratings (982 Votes)
Null hypothesis Ho 100Alternative hypothesis H1 100Left tailed testSample size n 25Degrees of freedom n1 25124Significance level    See Answer
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