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. The amount of snowfall falling in a certain mountain range is normally distributed with a mean of and a standard deviation of What is the probability that the mean annual snowfall during 36 randomly picked years will exceed 0.0808 0.0026 0.4192 0.5808
Question 8 1 points Save Solve the problem. The scores on a certain test are normally distributed with a mean score of 51 and a standard deviation of 2. What is the probability that a sample of 90 students will have a mean score of at least 51.2108? 0.8413 0.3174 0.1587 0.3413
Question 9 1 points Save Solve the problem. A bank's loan officer rates applicants for credit. The ratings are normally distributed with a mean of 200 and a standard deviation of 50. If 40 different applicants are randomly selected, find the probability that their mean is above 215. 0.4713 0.0287 0.1179 0.3821
Question 10 1 points Save Solve the problem. In one region, the September energy consumption levels for single-family homes are found to be normally distributed with a mean of and a standard deviation of If 50 different homes are randomly selected, find the probability that their mean energy consumption level for September is greater than 0.2910 0.4562 0.2090 0.0438
Question 11 1 points Save Solve the problem. Assume that women's heights are normally distributed with a mean of 63.6 inches and a standard deviation of 2.5 inches. If 90 women are randomly selected, find the probability that they have a mean height between 62.9 inches and 64.0 inches. 0.9318 0.7248 0.1739 0.0424
Question 12 1 points Save Solve the problem. Suppose that replacement times for washing machines are normally distributed with a mean of and a standard deviation of 1.1 years. Find the probability that 70 randomly selected washing machines will have a mean replacement time less than 0.0643 0.0714 0.4286 0.4357
Question 13 1 points Save Solve the problem. Human body temperatures are normally distributed with a mean of and a standard deviation of If 19 people are randomly selected, find the probability that their mean body temperature will be less than 0.4826 0.3343 0.9826 0.0833
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