Question: A sociologist wants to construct a 98% confidence interval for the proportion of children aged 8-10 living in New York who own a smartphone.A survey

A sociologist wants to construct a 98% confidence interval for the proportion of children aged 8-10 living in New York who own a smartphone.A survey by the National Consumers League estimated the nationwide proportion to be 0.39. Estimate the sample size needed if no estimate of p is available

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