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Please answer part 4 How many computers? In a simple random sample of 170 households, the sample mean number of personal computers was 1.55. Assume

Please answer part 4
How many computers? In a simple random sample of 170 households, the sample mean number of personal computers was 1.55. Assume the population standard deviation is c=0.7. (a) Construct a 90% condence interval for the mean number of personal computers. Round the answer to at least two decimal places. A 90% condence interval for the mean number of personal computers is

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