Data Analysis of Select Statistical
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Wk7.docxWk 7 Quiz - Estimation Practice [due Mon]
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Test Content
1.
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Complete the quiz to test your knowledge of estimation before applying it in this week’s assignment.
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Use this data for questions 1-5: Estimation Practice data and
Calculate the population mean using this CI calculator Confidence Interval Calculator
https://www.mathsisfun.com/data/confidence-interval-calculator.html
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Question 1
2 Points
What is the 95% confidence interval for the mean number of years of education for lower-class respondents?
1.
11.60 to 12.62
2.
23.20 to 25.24
3.
5.80 to 6.31
4.
13.60 to 14.62
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Question 2
2 Points
What is the 95% confidence interval for the mean number of years of education for and working-class respondents?
1.
14.76 to 15.25
2.
12.76 to 13.25
3.
25.50 to 26.50
4.
6.38 to 6.63
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Question 3
2 Points
What is the 99% confidence interval for the mean number of years of education for lower-class respondents?
1.
11.44 to 12.78
2.
5.72 to 6.39
3.
13.55 to 14.89
4.
22.88 to 25.56
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Question 4
2 Points
What is the 99% confidence interval for the mean number of years of education for and middle-class respondents?
1.
18.65 to 19.33
2.
4.65 to 5.33
3.
7.33 to 7.67
4.
14.65 to 15.33
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Question 5
2 Points
A teacher has 25 students and the mean score on their first math exam is 70 with a standard deviation of 5, with a 95% confidence interval the population mean is between what?
1.
68 and 72
2.
65 and 75
3.
60 and 80
4.
50 and 70
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Though 70% of women with children younger than 18 years participate in the labor force, society still upholds the stay-at-home mother as the traditional model. Some believe that employment distracts mothers from their parenting role, affecting the well-being of children. In the GSS 2014, respondents were asked to indicate their level of agreement to the statement, “A working mother hurts children.” Of the 435 male respondents who answered the question, 18% strongly agreed that a working mother does not hurt children.
You can calculate the confidence interval by using the File in SPSS, Excel, or by hand using the formula in your book. Use these files for problems 6 and 7.
Problem 6 Week 7.csv
Problem 6 Week 7.sav
This video shows you how to do it. Calculate the Confidence Interval Using SPSS
This video shows you how to do it in Excel Calculate the CI in Excel
If you use Excel, it requires several steps. You will also need to know the Z scores Z Scores for Different CIs
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Question 6
2 Points
What is the 90% confidence interval for this statistic for males?
1.
0.30 to 0.42
2.
0.08 to 0.11
3.
0.787 to .850
4.
1.50 to 2.10
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Question 7
2 Points
What is the 95% confidence interval for this statistic for males?
1.
0.74 to 0.86
2.
0.781 to .855
3.
0.787 to 0.850
4.
1.65 to 2.23
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According to a report published by the Pew Research Center in February 2010, 61% of Millennials (Americans in their teens and 20s) think that their generation has a unique and distinctive identity (N = 527).
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Question 8
2 Points
What is the 95% confidence interval to estimate the percentage of Millennials who believe that their generation has a distinctive identity as compared with the other generations (Generation X, Baby Boomers, or the Silent Generation)?
Use this data file for questions 8-10
Problem 8 & 9 Week 7.csv
Problem 8 & 9 Week 7.sav
1.
CI = 1.84 to 2.16
2.
CI = 1.88 to 2.76
3.
CI = .84 to 1.16
4.
CI = .35 to .43
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Question 9
2 Points
What is the 99% confidence interval?
1.
CI = .36 to .45
2.
CI = .46 to .56
3.
CI = 1.77 to 2.24
4.
CI = 1.25 to 1.76
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Question 10
2 Points
Are both these results compatible with the conclusion that the majority of Millennials believe that they have a unique identity that separates them from the previous generations?
1.
Yes
2.
No
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