Posted by **Beverly** on Friday, April 1, 2011 at 1:25am.

A major television network is trying to determine whether to increase or decrease the number of news-based television shows. They conducted a national survey and found that their population watched 8 news shows each week. Now they need your help to determine if the mean number of news shows watched in your neighborhood is similar to the national mean.

- sample t-test -
**PsyDAG**, Friday, April 1, 2011 at 1:57pm
What is your question?

Z = (mean1 - mean2)/standard error (SE) of difference between means

SEdiff = √(SEmean1^2 + SEmean2^2)

SEm = SD/√(n-1)

If only one SD is provided, you can use just that to determine SEdiff.

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to your Z score to compare it to your level of significance.

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