The standard error of the regression coefficient measures the variation in the regression coefficient among several samples.
Indicate whether the statement is true or false
Q. 2A recent survey conducted by the Country Financial Security Index asked adults 18 and older if they felt that next year will be financially better for them. Thirty percent of the respondents answered Yes.
To verify these findings, a random sample of 250 adults was asked the same question. A total of 55 adults from this sample responded Yes. Which of the following statements is correct?A) The interval that contains 95 of the sample proportions is 0.205 and 0.395. Because the sample proportion is between these two values, we have support for the results of the Country Financial Security Index survey.
B) The interval that contains 95 of the sample proportions is 0.205 and 0.395. Because the sample proportion is not between these two values, we do not have support for the results of the Country Financial Security Index survey.
C) The interval that contains 95 of the sample proportions is 0.243 and 0.357. Because the sample proportion is between these two values, we have support for the results of the Country Financial Security Index survey.
D) The interval that contains 95 of the sample proportions is 0.243 and 0.357. Because the sample proportion is not between these two values, we do not have support for the results of the Country Financial Security Index survey.
Q. 3A professor would like to test the hypothesis that the median number of minutes that a student needs to complete a statistics exam is equal to 50 minutes.
The following random sample of exam times from 12 students was collected to test this hypothesis.
54 62 67 43 55 59
55 64 60 58 44 56
The appropriate nonparametric procedure for this analysis is the _________________ test.
A) Kruskal-Wallis
B) Wilcoxon rank-sum
C) sign
D) Wilcoxon signed-rank
Q. 4The Affordable Care Act is a healthcare reform bill that President Obama signed into law on March 23, 2010. This bill is also known as ObamaCare. A recent survey conducted by Jackson & Coker found that only 13 of doctors support this legi
To validate these findings, a random sample of 300 doctors was asked if they support the Affordable Care Act. A total of 54 doctors from this sample responded that they supported this bill. Which of the following statements is correct?A) The interval that contains 95 of the sample proportions is 0.092 and 0.168. Because the sample proportion is between these two values, we have support for the results of the Jackson & Coker survey.
B) The interval that contains 95 of the sample proportions is 0.092 and 0.168. Because the sample proportion is not between these two values, we do not have support for the results of the Jackson & Coker survey.
C) The interval that contains 95 of the sample proportions is 0.064 and 0.196. Because the sample proportion is between these two values, we have support for the results of the Jackson & Coker survey.
D) The interval that contains 95 of the sample proportions is 0.064 and 0.196. Because the sample proportion is not between these two values, we do not have support for the results of the Jackson & Coker survey.
Q. 5When testing the significance of the regression coefficient, the null hypothesis assumes that no relationship exists between the dependent and independent variables.
Indicate whether the statement is true or false
Quick Reply
