The range of scores on a statistics test was 42. The lowest score was 57. What was the highest score?
A) 78 B) 70.5
C) 99 D) cannot be determined
Q. 2The amount spent on textbooks for the fall term was recorded for a sample of five university students - 400, 350, 600, 525, and 450. Calculate the value of the sample standard deviation for the data.
A) 99.37 B) 250 C) 98.75 D) 450
Q. 3Nearly 100 of the observed occurrences of a random variable x that is normally distributed will fall within three standard deviations of the mean of the distribution of x.
A) True B) False
Q. 4The amount spent on textbooks for the fall term was recorded for a sample of five university students - 400, 350, 600, 525, and 450. Calculate the value of the sample range for the data.
A) 98.75 B) 99.37 C) 250 D) 450
Q. 5The top speeds for a sample of five new automobiles are listed below. Calculate the standard deviation of the speeds. Round to four decimal places.
200, 105, 100, 190, 160
A) 46.6905 B) 243.2745 C) 136.03 D) 175.0528
Q. 6Calculate the range of the following data set:
8, 9, 9, 2, 6, 13, 9, 7, 4
A) 13 B) 15 C) 2 D) 11
Q. 7If A and B,are independent events, then P(A ) = P(B ).
A) True B) False
Q. 8Two events, A and B, are independent if P(A and B ) = P(A ) P(B ).
A) True B) False
Q. 9For a continuous probability distribution, the probability that x is between a and b is the same regardless of whether or not you include the endpoints, a and b, of the interval.
A) True B) False
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