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Asked Dec 14, 2019

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A research group wishes to estimate the mean number of hours that high school students spend watching TV on a weekday.

A margin of error of

e=0.30 hour is desired. Past studies suggest that a population standard deviation of

σ=1.2 hours is reasonable. Estimate the minimum sample size required to estimate the population mean with 95% confidence.

The required sample size is

__________?

(Round up to the nearest whole number.)

Step 1

Given that,

Margin of error = 0.30

Population standard deviation σ =1.2

Confidence interval 95%.

Sample size=?

Step 2

The formula for calculating sample size is

Step 3

Sub the given ...

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