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13 Nov 2019
LSAT test scores are normally distributed with a mean of 142 and a standard deviation of 9. Find the probability that a randomly chosen test-taker will score 160 or higher.
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Tod Thiel
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6 Oct 2019
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Consider the following table. For a particular value, this table gives the percent of scores between the mean and the z-value of a normally distributed random variable. What percent of the total population is found between the mean and the z-score, assume z = 2.7 9.
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Consider the following table. For a particular value, this table gives the percent of scores between the mean and the z-value of a normally distributed random variable. What percent of the total population is found between the mean and the z-score, assume z = 2.7 9.
Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people. How many would you expect to be between 157 and 173 cm tall? How many would you expect to be taller than 160 cm?
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Suppose that people's heights (in centimeters) are normally distributed, with a mean of 165 and a standard deviation of 6. We find the heights of 80 people. How many would you expect to be between 157 and 173 cm tall? How many would you expect to be taller than 160 cm?
The diameter of an electric cable is normally distributed, with a mean of 0. 8 inch and a standard deviation of 0. 01 inch. What is the probability that the diameter will exceed 0. 83 inch? (Give the answer to four decimal places.)
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The diameter of an electric cable is normally distributed, with a mean of 0. 8 inch and a standard deviation of 0. 01 inch. What is the probability that the diameter will exceed 0. 83 inch? (Give the answer to four decimal places.)
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