SOLUTION: Suppose that the amount of time teenagers spend on the internet per week is normally distributed with a standard deviation of 1.5 hours. A sample of 100 teenagers is selected at ra

Question 844304: Suppose that the amount of time teenagers spend on the internet per week is normally distributed with a standard deviation of 1.5 hours. A sample of 100 teenagers is selected at random, and the sample mean computed as 6.5 hours. Determine and interpret the 99% confidence interval estimate of the population mean.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

ME = 

 6.5 - ME<  <  6.5 + ME

Note:

80%	z = 1.28155

90%	z =1.645

92%	z = 1.751

95%	z = 1.96

98%	z = 2.326

99%	z = 2.576

 

RELATED QUESTIONS

The number of minutes per week that students spend surfing the internet is normally... (answered by swincher4391)
The amount of daily time that teenagers spend on a brand A cell phone is normally... (answered by Boreal)
It has been found that the average time
Internet users spend online per week is 18.3... (answered by Boreal)
The amount of money that students spend on their cell phones per week is normally... (answered by Boreal)
A gym knows that each member, on average, spends 50 minutes at the gym per week, with a... (answered by Boreal)
The amount of time that office workers at Company XYZ spend on the computer each workday... (answered by ewatrrr)
Suppose, as is roughly true, the number of hours per week ninth-grade students spend... (answered by ewatrrr)
What propotion of A students studying statistics ?
The amount of time devoted to... (answered by rothauserc)
Hi, 

I needed help with the following:

The number of minutes per week that students  (answered by stanbon)