Mathematics, 15.04.2020 05:16 Northshoreranch

A survey of 240 young professionals found that one dash fourth of them use their cell phones primarily for e-mail. Can you conclude statistically that the population proportion who use cell phones primarily for e-mail is less than 0.31? Use a 95% confidence interval.

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A survey of 240 young professionals found that one dash fourth of them use their cell phones primari...