
Population Parameters
Authored by Anthony Clark
Mathematics
11th Grade

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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following answers is CORRECT for constructing a 98% confidence interval for a difference between two population proportions?
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Is there any difference between population variances at 99% level of confidence if the 99% confidence interval (CI) for the ratio of population variance is (0.78, 1.56)? Verify.
No difference because the 99% CI contains 1.
Yes, there is a difference because the 99% CI does not contain 0.
No difference because the upper limit of 99% CI is greater than the lower limit.
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Suppose a 95% confidence interval for \mu_1-\mu_2 is (-2.13,1.48), what can you conclude?
We are 95% confident that there is no difference between the population means.
We are 95% confident that there is a difference between the population means.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which statement is true?
Statement A only
Statement B only
Statements A and B
Neither A nor B
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
These symbols represent the mean and standard deviation for which of the following distributions?
The Population
The Sample
The Sampling Distribution
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
What is a point estimate?
average of sample values
average of population values
a single value that represents the unknown sample statistic
a single value that represents the unknown population parameter
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The scores of a random sample of 100 high school students on a standardized mathematics test in school A gave a mean of 78 and a standard deviation of 20. Find the 95% confidence interval estimate for the true average score in mathematics in this standardized test.
1.96 to 3.92
76 to 80
74.08 to 81.92
74.80 to 81.29
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