How many computers? In a simple random sample of 200 households, the sample mean number of personal computers was 2.9. Assume the population standard deviation is 6 = 0.81. Part: 0 / 4 Part 1 of 4 (e) Construct a 98%% confidence interval for the mean number of personal computers, Round the answer to at least two decimal places. A 98% confidence interval for the mean number of personal computers is