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4. (20.37) Researchers claim that women speak significantly more words per day than men. One estimate...

4.

(20.37) Researchers claim that women speak significantly more words per day than men. One estimate is that a woman uses about 20,000 words per day while a man uses about 7,000. To investigate such claims, one study used a special device to record the conversations of male and female university students over a four- day period. From these recordings, the daily word count of the 20 men in the study was determined. Here are their daily word counts:

28411 10074 15930 21680 37792
10575 12882 11080 17802 13177
8916 6502 8159 7013 4431
10056 4007 12647 10977 5263

What value we should remove from observation for applying t procedures?

A 90% confidence interval (±±10) for the mean number of words per day of men at this university is from _____ to _____words.

Is there evidence at the 10% level that the mean number of words per day of men at this university differs from 9000?

No

Yes
Math   Statistics-And-Probability   
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