# Sample size calculation-High-speed Internet Access

A researcher wishes to estimate with 99% confidence, the proportion of adults who have high-speed Internet access. Her estimate must be accurate within 2% of the true proportion.

a) ind the minimum sample size needed, using a prior study that found that 36% of the respondents said they have high-speed Internet access.

What is the minimum sample size needed using a prior study that found that 36% o the respondents said they have high-speed internet access?

N=______ Round up to the nearest whole number as needed.

b) What is the minimum sample size needed assuming that no preliminary estimate is available?

N=______ Round up to the nearest whole number as needed.

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#### Solution Summary

The solution provides step-by-step method for the calculation of sample size. Formula for the calculation and Interpretations of the results are also included.