Student Math Test Score English Test Score 1 30 25 2 28 26 3 29 27 4 20 30 5 18 16 6 20 16 7 29 25 8 29 26 9 30 27 10 26 30 11 28 15 12 19 15 13 19 15 14 26 16 15 29 27 a. Find the confidence interval and margin of error in the difference of the mean of two subjects at 90% confidence level. Interpret. b. What is the minimum sample size necessary if the goal is 30% margin of error. The estimate is 95% confidence interval of the proportion of students who show interest in English subject, and previous record shows that 30% of stidents are interested.

Student Math Test Score English Test Score 1 30 25 2 28 26 3 29 27 4 20 30 5 18 16 6 20 16 7 29 25 8 29 26 9 30 27 10 26 30 11 28 15 12 19 15 13 19 15 14 26 16 15 29 27 a. Find the confidence interval and margin of error in the difference of the mean of two subjects at 90% confidence level. Interpret. b. What is the minimum sample size necessary if the goal is 30% margin of error. The estimate is 95% confidence interval of the proportion of students who show interest in English subject, and previous record shows that 30% of stidents are interested.

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.7: Probability

Problem 58E: What is meant by the sample space of an experiment?

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Student	Math Test Score	English Test Score
1	30	25
2	28	26
3	29	27
4	20	30
5	18	16
6	20	16
7	29	25
8	29	26
9	30	27
10	26	30
11	28	15
12	19	15
13	19	15
14	26	16
15	29	27