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Question: A high-school department made a change in its curriculum. One of the instructors in the department suspected that the change would result in a lowering of math skills. Students in the old program showed a mean of 70 points on a mathematics proficiency exam. Forty-two students from the new program had the scores in the dataset MATHEMATICS TEST SCORES (attached). The standard deviation of the all students over the years has been 10.34. Use a 2% level of significance.

a. Set up a hypothesis test

i. State the null and alternative hypothesis

ii. Confidence intervals of scores and the z or t intervals.

b. What are the results of the test (do the data indicate that the new program results in a lowering of math skills).

c. Do a P test. Are the two tests consistent?

d. Should the department us the new curriculum and why?

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M92284620

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