The owner of a computer repair shop has determined that their daily revenue has mean 7200 and standard deviation 1200. The daily revenue totals for the next 30 days will be monitored.
What is the probability that the mean daily revenue for the next 30 days will exceed 7500? A) 0.0853 B) 0.9131 C) 0.0869 D) 0.9147
Q. 2The dean of a major university claims that the mean number of hours students study at her University (per day) is at most 3.2 hours. If a hypothesis test is performed, how should you interpret a decision that rejects the null hypothesis?
A) There is sufficient evidence to reject the claim = 3.2.
B) There is not sufficient evidence to reject the claim = 3.2.
C) There is sufficient evidence to support the claim = 3.2.
D) There is not sufficient evidence to support the claim = 3.2.
Q. 3The distribution of salaries of professional basketball players is skewed to the right. Which measure of central tendency would be the best measure to determine the location of the center of the distribution?
A) median B) mode C) mean D) frequency
Q. 4The number of goals scored at State College soccer games follows a Poisson process with a goal scored approximately every 18 minutes (a soccer game consists of 2 45 -minute halves).
What is the standard deviation of the mean number of goals scored during a game? A) 2.34 B) 1.58 C) 1.12 D) 1.27
Q. 5The mean number of rushing yards for one NFL team was less than 110 yards per game. If a hypothesis test is performed, how should you interpret a decision that fails to reject the null hypothesis?
A) There is not sufficient evidence to support the claim < 110.
B) There is sufficient evidence to reject the claim < 110.
C) There is not sufficient evidence to reject the claim < 110.
D) There is sufficient evidence to support the claim < 110.
Q. 6Describe the shape of the histogram. The data set: round-trip commuting times (in minutes) of 20 randomly selected employees 135 120 115 132 136 124 119 145 98 110 125 120 115 130 140 105 116 121 125 108
A) skewed to the right B) uniform
C) skewed to the left D) symmetric
Q. 7The legal profession conducted a study to determine the percentage of cardiologists who had been sued for malpractice in the last five years. The sample was randomly chosen from a national directory of doctors.
Identify the individuals in the study. A) each cardiologist selected from the directory
B) the responses: have been sued/have not been sued for malpractice in the last five years
C) the doctor's area of expertise (i.e., cardiology, pediatrics, etc.)
D) all cardiologists in the directory
Q. 8A 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. 9The number of goals scored at State College soccer games follows a Poisson process with a goal scored approximately every 18 minutes (a soccer game consists of 2 45 -minute halves). What is the mean number of goals scored during a game
A) 5 B) 2.5 C) 0.11 D) 1.25
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