213.5 points | Previous Answers BBUnderStat 10 5.3.009. My Notes Ask Your T Does

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213.5 points | Previous Answers BBUnderStat 10 5.3.009. My Notes Ask Your T Does the kid factor make a difference? If you are talking photography, the answer may be yes! Ages of children in household, years Under 2 None under 21 Let us say you are a market research person who interviews a random sample of 11 households. (a) Suppose you interview 11 households with children under the age of 2 years. Let r represent the number of such households that buy film. Make a histogram showing the probability distribution of r for r = 0 through r = 11 03 02 025 0.15 02 Pr) Pir) 0.15 0.1 0.1 0.05 0.05 0 1 2 3456789 10 11 0 1 2 3 45678 9 10 11 0.25 02 02 0.15 0.15 Ptr) Pir 0.1 0.1 0.05 0.05 0 1 2 345 6789 101 0 1 23 45678910 11 Find the mean and standard deviation of this probability distribution. (Round your answers to two decimal places.) = | 9.35 = 1.37 households X households

Explanation / Answer

p = 0.85

n = 11

Mean = n * p = 11 * 0.85 = 9.35

Standard deviation = sqrt(n * p * (1-p)) = sqrt(11 * 0.85 * 0.15) = 1.18

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