A 99% confidence interval for a population mean based on a sample of size 64 is computed to be (16.3, 18.7). How large a sample is needed so that a 99% confidence interval will specify the mean to within ±1.0?
What will be an ideal response?
Let n be the required sample size.
The 99% confidence interval based on 64 observations has width ±1.2.
Therefore
Now n satisfies the equation Solving for n yields n = 93.
Trades & Technology
You might also like to view...
Mr. Scott has a herd of 178 cows on a 1,205-acre farm and 5/8 of the cows have calves. How many cows have a calf?
What will be an ideal response?
Trades & Technology
Baited traps are used to harvest _____
A) trout B) salmon C) catfish D) crayfish
Trades & Technology
-5 + 13 =
A) -18 B) 8 C) -8 D) 18
Trades & Technology
Find the Thévenin equivalent of the network seen by R in Figure P3.55 and use the result to compute the current iR.
Trades & Technology