In a contest in which 7 contestants are entered, in how many ways can the 5 distinct prizes be awarded?
A) 2520 B) 42 C) 21 D) 84
Q. 2A government agency believes that the median hourly wages for retail store workers in the central U.S. is 6.40. In a random sample of 100 workers, 68 were paid less than 6.40, 10 were paid 6.40, and the rest more than 6.40.
Find the critical values to test the governments hypothesis. Use = 0.05. A) 1.96 B) 1.645 C) 2.575 D) 2.33
Q. 3A farmer was interest in determining how many grasshoppers were in his field. He knows that the distribution of grasshoppers may not be normally distributed in his field due to growing conditions.
As he drives his tractor down each row he counts how many grasshoppers he sees flying away. After several rows he figures the mean number of flights to be 57 with a standard deviation of 12. What is the probability of the farmer will count 52 or fewer flights on average in the next 40 rows down which he drives his tractor? A) 0.0041 B) 0.4959 C) 0.9959 D) 0.0410
Q. 4The commuting times (in minutes) of an employee for ten consecutive days are listed below. Find the median commute. 71 67 67 72 76 72 73 68 72 72
A) 72 minutes B) 67 minutes C) 71 minutes D) 73 minutes
Q. 5A college dean believes that the median hours spent studying by full time students is at least 11 hours per week.
In a random sample of 100 students, 60 studied more than 11 hours, 10 studied exactly 11 hours and the rest studied less than 11 hours. Find the test statistic to test the deans hypothesis. Use = 0.05. A) -3.057 B) -3.162 C) -3.9 D) -4
Q. 6The mean age of professors at a university is greater than 58.3 years. If a hypothesis test is performed, how should you interpret a decision that rejects the null hypothesis?
A) There is sufficient evidence to support the claim > 58.3.
B) There is sufficient evidence to reject the claim > 58.3.
C) There is not sufficient evidence to reject the claim > 58.3.
D) There is not sufficient evidence to support the claim > 58.3.
Q. 7A church has 8 bells in its bell tower. Before each church service 3 bells are rung in sequence. No bell is rung more than once. How many sequences are there?
A) 336 B) 6720 C) 56 D) 13,440
Q. 8The number of students enrolled in a physics class for the last ten semesters are listed below. Find the median number of students. 65 66 67 66 67 70 67 70 71 68
A) 67 students B) 66 students C) 68 students D) 70 students
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