a-survey-records-the-time-in-minutes-past-700700-am-that-a-random-sample-of-3030

Question

A survey records the time, in minutes past $7 colon 00$ A.M., that a random sample of $30$ students wake up for an early class. The population standard deviation is known to be $25$ minutes. Calculate the point estimate of the population mean, $μ$ , and the margin of error for a $90 percent sign$ confidence interval.
$3 lines Line 1: 60 75 90 85 70 65 80 95 100 60 Line 2: 85 90 75 80 70 65 90 100 85 80 Line 3: 75 70 65 60 95 100 85 80 75 70$

Accepted Answer

xˉ≈79.2 min\bar{x}\approx{79.2~	ext{min}} E≈7.5 minE\approx{7.5~	ext{min}}

Answer

xˉ≈79.2 min\bar{x}\approx{79.2}~	ext{min}E≈8.9 minE\approx8.9~	ext{min}

Answer

xˉ≈81.9 min\bar{x}\approx{81.9}~	ext{min}E≈8.9 minE\approx8.9~	ext{min}

Answer

xˉ≈81.9 min\bar{x}\approx{81.9~	ext{min}}E≈7.5 minE\approx{7.5}~	ext{min}