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Nielsen Media Research wants to estimate the mean amount of time ( in minutes) that full-time...

Nielsen Media Research wants to estimate the mean amount of time ( in minutes) that full-time college students spend watching television each weekday. Find the sample size necessary to estimate that mean with a 15-minute margin of error. Assume that a 96 % confidence level is desired. Also assume that a pilot study showed that the standard deviation is estimated to be 112.2 min.

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Answer #1

Given,

SD = 112.2

E = 15

For 96% confidence, z = 2.05

Hence,

Sample size required

n = 236

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