Section_5.2_-_distribution_of_the_average[1]

# Section_5.2_-_distribution_of_the_average[1] - Homework for...

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Homework for Section 5.2 - Distribution of the Sample Mean 1. True or false: In a well-designed sample, the sample average is likely to be equal to the average of the population. 2. The population of Monterey County is about four times as big as the population of Mendocino County. Suppose surveys are taken in each county. If everything else is the same, then in order to have the same accuracy, the Monterey sample should be: (pick one) four times as big as the Mendocino Survey twice as big as the Mendocino Survey the same size as the Mendocino Survey 3. If you bet \$10 on the number 43 at Keno the distribution of your gain is: gain chance \$20 .25 ! \$10 .75 The mean and standard deviation of the gain are μ = ! \$2.50 and σ . \$12.99. a. Suppose you plan to make this bet on 25 games. The games are independent. Find the mean and standard deviation of the average gain. b. Continuing part a: The total amount you gain for 25 bets is 25 × the average. So multiply

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## This note was uploaded on 09/23/2011 for the course MATH 324 taught by Professor Staff during the Spring '08 term at S.F. State.

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Section_5.2_-_distribution_of_the_average[1] - Homework for...

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