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To test the effectiveness of a lesson, a teacher gives randomly selected students a pretest and...

To test the effectiveness of a lesson, a teacher gives randomly selected students a pretest and follow-up test. The results are given below.

Student A B C D E F G H
Before 6 8 5 4 3 5 4 7
After 9 10 8 7 6 8 7 10

(a) At the 0.025 significance level, test the claim that the lesson was effective.

Original claim is made by Answer hypothesis.
Original claim is: ud Answer 0.
Test statistic: Answer
Critical value: Answer
P-value: Answer
Initial conclusion: We Answer the null hypothesis.
Final conclusion: There Answert enough evidence to support the claim.
(b) Construct a 95% confidence interval for the difference between the two proportions.
Answer< pmen - pwomen<Answer

Math   Statistics-And-Probability   
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