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Find the sample size necessary to estimate the mean IQ score of statistics students such that...

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Basic Math

Find the sample size necessary to estimate the mean IQ score ofstatistics students such that it can be said with 95​% confidencethat the sample mean is plus or minus3 IQ points of the true mean.Assume that the standard deviation is 15 and determine the requiredsample size.

2)

In a survey of

2,416 adults, 1,876 reported that​ e-mails are easy to​misinterpret, but only 1,231 reported that telephone conversationsare easy to misinterpret. Complete parts​ (a) through​ (c)below.

a. Construct a​ 95% confidence interval estimate for thepopulation proportion of adults who report that​ e-mails are easyto misinterpret.

Answer & Explanation Solved by verified expert
4.1 Ratings (696 Votes)
1The following information is providedSignificance Level 005 Margin or Error E 3 15The critical value for significance level 005 is 196The    See Answer
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