7.) The Pew Internet and American Life Project reported in 2004 that 55% of current music downloaders say they are using paid services. Consider a random sample of 18 music downloaders. a.) Find the probability that the sample contains 15 music downloaders who are using paid services using the formula. b.) Find the probability that the sample contains 10 or fewer music downloaders who are using paid services using the calculator. c.) Find the probability that the sample contains 9 or more music downloaders who are using paid services using the calculator. d.) Find the probability that the sample contains between 8 and 15, inclusive, music downloaders who are using paid services using the calculator. e.) Find the mean number of music downloaders who are using paid services. f.) Find the standard deviation of music downloaders who are using paid services.
7.) The Pew Internet and American Life Project reported in 2004 that 55% of current music downloaders say they are using paid services. Consider a random sample of 18 music downloaders.
a.) Find the
paid services using the formula.
b.) Find the probability that the sample contains 10 or fewer music downloaders who are
using paid services using the calculator.
c.) Find the probability that the sample contains 9 or more music downloaders who are
using paid services using the calculator.
d.) Find the probability that the sample contains between 8 and 15, inclusive, music
downloaders who are using paid services using the calculator.
e.) Find the mean number of music downloaders who are using paid services.
f.) Find the standard deviation of music downloaders who are using paid services.
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