explain clearly the three meaning of "statistics" contained in the statement below
"you compute statistics from statistics by statistics"
1 answer
The market research firm plans to estimate the difference between the mean ratings of two television programs. The it asks 100 viewers to the rate the first program on a scale from 0-10. The sample mea is is 5.3 and the sample variance is 1.6. I another sample of 400 viewers are asked to rate the second program on the same scale. The the sample mean is 5.8 and sample variance is 1.8. Calculate a 90% confidence interval for the difference between the mean ratings of the two programs in the population as a whole.
2 answers