In a random sample, 10 students were asked to compute the distance they travel o

Question

In a random sample, 10 students were asked to compute the distance they travel one way to school to the nearest tenth of a mile. The data is listed below. If a constant value k is added to each value, how will the standard deviation be affected? 1.1 5.2 3.6 5.0 4.8 1.8 2.2 5.2 1.5 0.8 The standard deviation will be multiplied by the constant k. The standard deviation will not be affected. The mean SAT verbal score is 462, with a standard deviation of 98. Use the Empirical Rule to determine what percent of the scores lie between 462 and 560. (Assume the data set has a bell-shaped distribution.) 47.5% 34% 49.9% 68% The mean length of a human pregnancy is 266 days, with a standard deviation of 9 days. Use the Empirical Rule to determine the percentage of women whose pregnancies are between 257 and 275 days. (Assume the data set has a bell-shaped distribution.) 68% 95% 99.7% 50% The mean score of a placement exam for entrance into a math class is 80, with a standard deviation, of 10. Use the Empirical Rule to find the percentage of scores that lie between 60 and 80. (Assume the data set has a bell-shaped distribution.) 68% 95% 34% 47.5%

Explanation / Answer

Answer - 4: The standard deviation will not be affected.

Answer - 5: Option B is correct (34%)

Answer - 6: Option A is correct (68%)

Answer - 7: Option D is correct (47.5%)

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