Determine the point estimate of the population mean. Find the margin of error for a 90% confidence interval.
Determine the minimum survey size that is necessary to be 95% confident that the sample mean waking time is within 10 minutes of the population mean waking time.
135 145 95 140 135 95 110 50
90 165 110 125 80 125 130 110
25 75 65 100 60 125 115 135
95 90 140 40 75 50 130 85
100 160 135 45 135 115 75 130