Confidence Intervals

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StudentAnswerSheet8week-Spring2021SectionB11.xlsx

Week 3

Class Age and Gender Data - Section B 11
Age Gender For the following questions, use only the "age" column:
18 F
27 F Points Age Frequency Distribution: Class Width
21 M
20 M Class Limits Midpoint Freq. Relative Frequency Cumulative Relative Freq
45 M Low High
47 M Limits 1
58 M Freq. 1
39 M Mid. 1
25 F RF 1
30 M CF 1
54 M
25 M 2 Mean *Round to two decimals
19 F 2 Median *Round to one decimal
20 F 2 Sample Standard deviation: *Round to two decimals
36 M 2 Q1 *Round to one decimal
35 F 2 Q3 *Round to one decimal
37 F
23 F
38 F Ogive: 5 Ogive: Polygon:
27 M Polygon 5
43 M
37 F
44 M
35 F Total: 25
27 M

Week 5

Class Age and Gender Data - Section B07
Age Gender Points 95% Confidence Interval for Average Age of Online College Students:
18 F
27 F Sample Mean: 0
21 M Sample St. Dev: 0 Normal Distribution
20 M 1 Sample Size: T-Distribution
45 M
47 M 2 Distribution:
58 M
39 M 2 Critical Value: *2 decimals
25 F
30 M 2 Margin of Error: *2 decimals Calculation:
54 M 1 Lower Bound: *2 decimals Calculation:
25 M 1 Upper Bound: *2 decimals Calculation:
19 F
20 F Interpret
36 M 2
35 F
37 F 95% Confidence Interval for Proportion of Male Online College Students:
23 F
38 F 1 Sample Size:
27 M 1 Number of Males:
43 M 2 Male Proportion: Female Proportion *4 decimals
37 F
44 M 2 Distribution:
35 F
27 M 2 Critical Value: *2 decimals
2 Margin of Error: *4 decimals Calculation:
1 Lower Bound: *4 decimals Calculation:
1 Upper Bound: *4 decimals Calculation:
Interpret
2
25 Total Points

Week 6

For the following two hypothesis tests, use the alpha = .05 level of confidence
Points Claim: The average age of online students is 32 years old.
1 Ho: Normal Distribution
2 Ha: T-Distribution
Sample mean: 0
Sample St. Dev: 0
2 Distribution:
2 Test Statistic: *2 decimals Calculation:
2 p-value: *4 decimals
3 Interpretation:
Claim: The proportion of males in online classes is 35%
1 Ho:
2 Ha:
Sample Proportion Males 0 Sample Proportion Females 0
2 Distribution:
3 Test Statistic: *2 decimals Calculation:
2 p-value: *4 decimals
3 Interpretation:
25 Total Points