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.
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
Related questions
Question
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
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