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What is the probability that four or more of them

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Reference no: EM132402477

A study conducted by a company reported that 58% of cell phone owners used their phones inside a store for guidance on purchasing decisions. A sample of 15 cell phone owners is studied.

a) What is the probability that four or more of them used their phones for guidance on purchasing decisions?

b) What is the probability that fewer than ten of them used their phones for guidance on purchasing decisions?

c) What is the probability that exactly eight of them used their phones for guidance on purchasing decisions?

d) Would it be unusual if more than 12 of them had used their phones for guidance on purchasing decisions?

Reference no: EM132402477

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