In hypothesis testing, such as testing the difference between two population proportions, which of the following statements is correct when the significance level is 0.05?
A) only statistics that occur with a probability of less than .95 when H0 is true are sufficient evidence to reject H0.
B) only statistics that occur with a probability of less than .05 when H0 is true are sufficient evidence to reject H0.
C) only statistics that occur with a probability of .95 or more when H0 is true are sufficient evidence to reject H0.
D) only statistics that occur with a probability of .05 or more when H0 is true are sufficient evidence to reject H0.
Q. 2What is the probability that you have to wait more than 20 minutes to be seated?
A) 0.1761
B) 0.3531
C) 0.6761
D) 0.1469
Q. 3Find the lower confidence limit of the 90 confidence interval.
A) 13.81
B) 18.24
C) 22.59
D) 25.89
Q. 4What is the probability that exactly two of them have modems?
A) 0.3288
B) 0.3704
C) 0.3596
D) 0.3012
Q. 5Which of the following best describes the multiplication rule of probabilities?
A) P(A B) = P(A) P(B)
B) P(A B) = P(A B) P(B)
C) P(A B) = P(A B) P(B)
D) P(A B) = P(A B) P(A)
Q. 6Suppose you have a set of data which has a bell-shaped histogram. Compare the interquartile range with the range from one standard deviation below the mean to one standard deviation above the mean. The interquartile range is smaller.
Indicate whether the statement is true or false
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