When the results of a hypothesis test are determined to be statistically significant, then we _______________ the null hypothesis.
A) reject B) fail to reject C) polarize D) compartmentalize
Q. 2The measures the percentage of total variation in the response variable that is explained by the least squares regression line.
A) coefficient of determination B) coefficient of linear correlation
C) sum of the residuals squared D) slope of the regression line
Q. 3Suppose you want to test the claim that 65.4. Given a sample size of n = 35 and a level of significance of = 0.01, when should you reject H0?
A) Reject H0 if the standardized test statistic is less than -2.33.
B) Reject H0 if the standardized test is less than -2.575.
C) Reject H0 if the standardized test statistic is less than -1.96.
D) Reject H0 if the standardized test statistic is less than -1.28.
Q. 4A quiz consists of 10 multiple choice questions, each with five possible answers, one of which is correct. To pass the quiz a student must get 60 or better on the quiz.
If a student randomly guesses, what is the probability that the student will pass the quiz? A) 0.006 B) 0.060 C) 0.377 D) 0.205
Q. 5John has six bills of paper money in the following denominations: 1, 5, 10, 20, 50, and 100 If he selects 3 bills at a time what is the probability of selecting a group that has an average value of equal to or less than 25?
A) 0.45 B) 0.86 C) 0.50 D) 0.35
Q. 6A traffic officer is compiling information about the relationship between the hour or the day and the speed over the limit at which the motorist is ticketed. He computes a correlation coefficient of 0.12. What does this tell the officer?
A) There is a weak positive linear correlation.
B) There is a moderate positive linear correlation.
C) There is a moderate negative linear correlation.
D) There is insufficient evidence to make any conclusions about the relationship between the variables.
Q. 7Suppose you want to test the claim that > 25.6. Given a sample size of n = 53 and a level of significance of = 0.01, when should you reject H0?
A) Reject H0 if the standardized test statistic is greater than 2.33.
B) Reject H0 if the standardized test statistic is greater than 1.96.
C) Reject H0 if the standardized test statistic is greater than 2.575.
D) Reject H0 if the standardized test statistic is greater than 1.645.
Q. 8John has six bills of paper money in the following denominations: 1, 5, 10, 20, 50, and 100 If he selects 3 bills at a time what is the probability of selecting a group that has an average value of between 40 and 45?
A) 0.15 B) 0.05 C) 0.25 D) 0.20
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