Mathematics, 25.10.2019 00:43 Haru3

Binomial distribution problem. a study conducted by the pew research center reported that 60% of cell phone owners used their phones inside a store for guidance on purchasing decisions. a sample of 20 cell phone owners is studied.

a) what is the standard deviation of cell phone users that used their phones for guidance on purchasing decisions?

b) what is the probability that 10 or more used their phones for guidance on purchasing decisions?

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