A random sample of 150 mortgages in the state of Mississippi was randomly selected. From this sample, 17 were found to be delinquent on their current payment. The 98 confidence interval for the proportion based on this sample is ________.
A) (0.095, 0.131)
B) (0.074, 0.152)
C) (0.053, 0.173)
D) (0.103, 0.216)
Q. 2The adjusted multiple coefficient of determination will always be greater than or equal to the multiple coefficient of determination.
Indicate whether the statement is true or false
Q. 3A study conducted by UCLA's Cooperative Institutional Research program found that 39.5 of college freshman spent six or more hours a week studying or doing homework during their senior year in high school.
To verify these results, a random sample of 200 freshmen was asked how many hours they studied a week during their senior year in high school. A total of 88 students from this sample responded that they studied six or more hours a week. Which of the following statements is correct?A) The interval that contains 95 of the sample proportions is 0.3647 and 0.4253. Because the sample proportion is between these two values, we have support for the results of UCLA's study.
B) The interval that contains 95 of the sample proportions is 0.3647 and 0.4253. Because the sample proportion is not between these two values, we have support for the results of UCLA's study.
C) The interval that contains 95 of the sample proportions is 0.3272 and 0.4628. Because the sample proportion is between these two values, we have support for the results of UCLA's study.
D) The interval that contains 95 of the sample proportions is 0.3272 and 0.4628. Because the sample proportion is not between these two values, we do not have support for the results of UCLA's study.
Q. 4If adding an independent variable results in a reduction in the adjusted , we have evidence that the new variable might not be contributing enough explanation of the dependent variable to remain in the model.
Indicate whether the statement is true or false
Q. 5A random sample of 150 mortgages in the state of Mississippi was randomly selected. From this sample, 17 were found to be delinquent on their current payment. The approximate standard error of the proportion for this sample is ________.
A) 0.0145
B) 0.0258
C) 0.0406
D) 0.0567
Q. 6According to the Gallup Crime survey, 26 of gun owners are women. From a random sample of 160 gun owners, 26 were female. Which of the following statements is correct?
A) The interval that contains 95 of the sample proportions is 0.192 and 0.328. Because the sample proportion is between these two values, we have support that the proportion of gun owners who are female is 26.
B) The interval that contains 95 of the sample proportions is 0.192 and 0.328. Because the sample proportion is not between these two values, we do not have support that the proportion of gun owners who are female is 236.
C) The interval that contains 95 of the sample proportions is 0.225 and 0.295. Because the sample proportion is between these two values, we have support that the proportion of gun owners who are female is 26.
D) The interval that contains 95 of the sample proportions is 0.225 and 0.295. Because the sample proportion is not between these two values, we do not have support that the proportion of gun owners who are female is 26.
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