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How many computers? In a simple random sample of 130 households, the sample mean number of personal computers was 1.77. Assume the population standard deviation

How many computers? In a simple random sample of 130 households, the sample mean number of personal computers was 1.77. Assume the population standard deviation is o = 0.57. Construct a 90% confidence interval for the mean number of personal computers. Round the answer to at least two decimal places.

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