Asked by john

explain clearly the three meaning of "statistics" contained in the statement below
"you compute statistics from statistics by statistics"
Answered by Kabwe Chisanga
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.
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