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One question asked in the General Social Survey was this: “How many e-mails do you send in a day?” The results of 928 respondents indicate that the mean number of e-mails sent in a day is 10.4, with a standard deviation of 28.5.

(a) Given the fact that 1st and ard deviation to the left of the mean results in a negative number of e-mails being sent,what shape would you expect the distribution of e-mails sent to have?

(b) Construct and interpret a 90% conﬁdence interval for the mean number of e-mails sent per day.

The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...

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