How many computers In a simple random sample of175 households, the sample mean number of personal computers was1.26 . Assume the population standard deviation is . o=0.35

(a) Construct a90% confidence interval for the mean number of personal computers. Round the answer to at least two decimal places --- < u<--

2. a sample of size n=31 has sample mean x=58 and sample standard deviation s=6.6

(a) Construct an 80% confidence interval for the population mean u. Enter the values for the lower and upper limits and the mean to graph. Round the answers to one decimal place.