A sample of 50 students was taken from the local university. These students spent an average of $170 on books this semester. With a standard deviation of $25.50. A 95 percent confidence interval for the average spent on books for all students would be A.) none of these B.) 170 plus minus 3.462 C.) 170 plus minus 8.42 D.) 170 plus minus 5.95 The t value that would be used to construct a 99 percent confidence interval for the mean with a sample size of n=17 would be A.) 2.567 B.) 2.583 C.) 2.898 D.) 2.92
A sample of 50 students was taken from the local university. These students spent an average of $170 on books this semester. With a standard deviation of $25.50. A 95 percent confidence interval for the average spent on books for all students would be A.) none of these B.) 170 plus minus 3.462 C.) 170 plus minus 8.42 D.) 170 plus minus 5.95 The t value that would be used to construct a 99 percent confidence interval for the mean with a sample size of n=17 would be A.) 2.567 B.) 2.583 C.) 2.898 D.) 2.92
A sample of 50 students was taken from the local university. These students spent an average of $170 on books this semester. With a standard deviation of $25.50. A 95 percent confidence interval for the average spent on books for all students would be A.) none of these B.) 170 plus minus 3.462 C.) 170 plus minus 8.42 D.) 170 plus minus 5.95 The t value that would be used to construct a 99 percent confidence interval for the mean with a sample size of n=17 would be A.) 2.567 B.) 2.583 C.) 2.898 D.) 2.92
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A sample of 50 students was taken from the local university. These students spent an average of $170 on books this semester. With a standard deviation of $25.50. A 95 percent confidence interval for the average spent on books for all students would be
A.) none of these
B.) 170 plus minus 3.462
C.) 170 plus minus 8.42
D.) 170 plus minus 5.95
The t value that would be used to construct a 99 percent confidence interval for the mean with a sample size of n=17 would be
A.) 2.567 B.) 2.583 C.) 2.898 D.) 2.921
Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.
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