A study was conducted in order to estimate μ, the mean number of weekly hours that U.S. adults use computers at home. Suppose a random sample of 81 U.S. adults gives a mean weekly computer usage time of 8.5 hours and that from prior studies, the population standard deviation is assumed to be σ = 3.6 hours.
Question 2
Select one answer.
10 points
Based on this information, what would be the point estimate for μ?
81
8.5
3.6
None of the above.
The only indication you have for the mean is what?
8.5
None of the above
8.5
To find the point estimate for μ, the mean number of weekly hours that U.S. adults use computers at home, we can look at the given information. The point estimate is the value that we estimate the population parameter to be based on the sample data.
In this case, the sample mean weekly computer usage time is given as 8.5 hours. Therefore, the point estimate for μ is 8.5.
So, the correct answer is 8.5.