Life time of flowers in a bouquet is normally distributed, Ask an Expert

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Life time of flowers in a bouquet is normally distributed with a mean of 6 days and a standard deviation of 1.7 days.

a. what is the probability that one random selected will last more than 7 days?

b. what is the prob that the mean lifetime of 5 bouquets will be less than 5 days?

c. as the sample size increases will the stanard error of the mean go up or down?

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Category:- Statistics and Probability
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