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  3. a. all hypothesis tests must include all four step

a. all Hypothesis Tests must include all four steps, clearly labeled; b. all Confidence Intervals must include...

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Statistics

a. all Hypothesis Tests must include all four steps,clearly labeled;

b. all Confidence Intervals must include all output aswell as the CI itself

c. include which calculator function you used for eachproblem.

2. An experiment was done to see whether open-book testsmake a difference. A calculus class of 48 students agreed to berandomly assigned by the draw of cards to take a quiz either byopen-notes or closed-notes. The quiz consisted of 30 integrationproblems of varying difficulty. Students were to do as many aspossible in 30 minutes. The 24 students taking the examclosed-notes got an average of 15 problems correct with a standarddeviation of 2.5. The open-notes crowd got an average of 12.5correct with a standard deviation of 3.5. Assume that thepopulations are approximately normal. At the 5% significance level,does this data suggest that differences exist in the mean scoresbetween the two methods?

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