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The budgeting web site Hello Wallet reported that 25% of U.S. households have withdrawn money from...

The budgeting web site Hello Wallet reported that 25% of U.S. households have withdrawn money from a 401K or other retirement fund for needs other than retirement. Suppose 12 U.S. households are selected at random. (a) What is the probability that exactly 2 households withdrew money from a 401K or other retirement fund for needs other than retirement? (b) What is the probability that fewer than 3 households withdrew money from a 401K or other retirement fund for needs other than retirement? (c) What is the probability that at least 3 households withdrew money from a 401K or other retirement fund for needs other than retirement? (d) What is the mean and standard deviation for this distribution?

math   Statistics-And-Probability   
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Answer #1

noo st rom a 40 Ginn thes Rinomial C n= 12, e=0.25) ) O 2020.5 0.2323 v 0 2323 0 .3907 I-P431-03107 O.603

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