The mean number of travel days per year for salespeople employed by three hardware distributors needs to be estimated with a 0.9
0 degree of confidence. For a small pilot study, the mean was 150 days and the standard deviation was 14 days. If the population mean is estimated within two days, how many salespeople should be sampled?
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Answer:
<h2>The answer is 0.1493.</h2>Step-by-step explanation:
In a standard deck there are 52 cards in total and there are 4 aces.
Two cards can be drawn from the 52 cards in ways.
There are (52 - 4) = 48 cards rather than the aces.
From these 48 cards 2 cards can be drawn in ways.
The probability of choosing 2 cards without aces is .
The probability of getting at least one of the cards will be an ace is .