Lies in the middle of the data when the data is Appears the most often J IH the

Question

Lies in the middle of the data when the data is Appears the most often J IH the data set? illI 8t ali the data values of the variable divided by the number of 14) data is arranged in ascending order 15) The April p 2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8 A) 1.4 inches 32i - B) 2.45 inches- (93.2 inches D) 2.8 inches In a random sample, 10 employees at a local plant were asked to compute the distance they travel to work to the nearest tenth of a mile. The data is listed below. Compute the range. 16) sample standard deviation and sample variance of the data. 1.1 5.2 3.6 5.0 4.8 1.8 2.2 5.2 1.5 0.8 17) At a tennis tournament a statistician keeps track of every serve. The statistician reported that the 17) mean serve speed of a particular player was 95 miles per hour (mph) and the standard deviation of the serve speeds was 10 mph. Assume that the statistician also gave us the information that the distribution of the serve speeds was bell shaped. What proportion of the player's serves are expected to be between 105 mph and 115 mph? D) 0.1350 C) 0.95 B) 0.68 A) 0.270 recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for government health care but who have no private health insurance. The ages of 25 uninsured senior citizens were as follows: 18) Health care issues are receiving much attention in both academic and political arenas. A sociologist 68 73 66 76 86 74 61 89 65 90 69 92 76 197 respectively. If we assume that the (7 68 81 70 73 60 87 75 64 82

Explanation / Answer

mean = 95 and std. dev. = 10

P(105 < X < 115) = P(X < 115) - P(X < 105)

P(X < 115) = P(z < (115-95)/10) = P(z < 2) = 0.9772
P(X < 105) = P(z < (105-95)/10) = P(z < 1) = 0.8413

P(105 < X < 115) = 0.9772 - 0.8413 = 0.1359

Option D is correct

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