Question: Suppose that the average person spends $8.40 per week on soft drinks, with a standard deviation of $2.70. A random sample of 45 people is

Suppose that the average person spends $8.40 per week on soft drinks, with a standard deviation of $2.70. A random sample of 45 people is taken. (a) What is the mean of this sample? (b) What is the standard deviation of this sample? (c) What is the probability that the average amount spent on soft drinks by a person in this sample is between $8 and $9?

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