Question 249654: 1. A nationwide real state company claims that its average time to sell a home is 57 days. Suppose it is known that the standard deviation of selling times is 12.3 days and that selling times are normally distributed. Assuming that the company's claim is true, if one home is selected at random, what is the probability that it will be sold in less than 63 days?
2. A nationwide real state company claims that iss average time to sell a home is 57 days. Suppose it is known that the standard deviation of selling times is 12.3 days and that selling times a re normally distributed. Assuming that the company's claim is true, if 9 home is selected at random, what is the probability that it will be sold in less than 63 days?
3.A nationwide real state company claims that iss average time to sell a home is 57 days. Suppose it is known that the standard deviation of selling times is 12.3 days and that selling times a re normally distributed. Assuming that the company's claim is true, if 64 homes is selected at random, there is a 75% probability that sample mean is greater than how many days?
Answer by richwmiller(17219)   (Show Source):
You can put this solution on YOUR website! real estate not real state.
Copy the problem correctly.
Repost the problem in English.
I already corrected other English spelling errors.
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