ID# DATE 12/19/ 2011 12 g Question 1: A two-tailed test is one where: a. results

Question

ID# DATE 12/19/ 2011 12 g Question 1: A two-tailed test is one where: a. results in only one direction can lead to rejection of the null hypothesis b. negative sample means lead to rejection of the null hypothesis c. results in either of two directions can lead to rejection of the null hypothesis d. no results lead to the rejection of the null hypothesis Question 2) If the null hypothesis is false, the mean square between is a good estimate for the population variance. True or False Question 3) When performing a hypothesis test to compare two or more population proportions, the test statistic follows the A) normal distribution B) Student's -distribution C) chi-square distribution D) F-distribution Question 4: The Wall Street Journal reported that the average amount of time that a French person spends eating lunch at a restaurant is 22 minutes. Perform a hypothesis test to determine if a difference exists between the average time an American spends eating lunch when compared to a person from France. The following data represents the time, in minutes, that random French and American diners spent at lunch. Assume that the population variances are equal. | 21 | 17 |17|20|25 16.1-20116 24 | 18 | 20 | 28 | 18-129-1-17- American rench The degrees of freedom for this hypothesis test are A) 7 B) 13 C) 14 D) 6 E) 15 Question 5: The frequencies refer to the frequencies that are most likely to occur if the null hypothesis is true when performing a hypothesis test comparing two or more population ons. A) relative B) expected C) cumulativeD observed

Explanation / Answer

Result:

Q1.

c. results in either of two directions can lead to rejection of the null hypothesis.

Q2.

False

Q3.

C. chi square distribution

Q4).

Df=8+7-2=13

Q5).

B. Expected

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