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WorksheetsP/S Ch. 16/17 Review
Total questions: 6
Worksheet time: 3mins
Suppose 20% of all incoming freshmen at a large university must take a remedial mathematics course. A random sample of 170 incoming freshmen is selected and the proportion of the sample needing to take a remedial math course (p-hat) is calculated.
What is the standard error for the sampling distribution of p-hat?
0.031
0.00096
5.22
0.062
Suppose 20% of all incoming freshmen at a large university must take a remedial mathematics course. A random sample of 170 incoming freshmen is selected and the proportion of the sample needing to take a remedial math course (p-hat) is calculated.
If the size of the sample described was made 4 times larger, what impact would that have on the standard error of the distribution?
The SE would get 4 times larger
The SE would get 4 times smaller
The SE would get 2 times larger
The SE would get 2 times smaller
Which of the following z* values should be used when constructing a 96% confidence interval?
2.05
1.96
2.33
2.58
Which of the following z* values should be used when constructing a 90% confidence interval?
1.64
1.96
1.28
2.58
A 95% confidence interval for the true proportion of incoming freshmen to a large university who must complete a remedial mathematics course is constructed: (0.164 , 0.224).
What is the margin of error for the given interval?
0.06
0.03
0.015
0.12
A 95% confidence interval for the true proportion of incoming freshmen to a large university who must complete a remedial mathematics course is constructed: (0.164 , 0.224).
How many incoming freshmen were surveyed?
668
220
180
557
