Explore BrainMass

Explore BrainMass

    Sample size for estimating population proportion

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    In an election campaign, the party vying for an upset polls a sample of 100 voters. The party finds that 60 of 100 clearly express the intention of voting in favour of the party polling. How many voters should be sampled if the party wants to estimate the population proportion with a sampling error of 5% or less? (Use confidence level of 95%)

    © BrainMass Inc. brainmass.com March 4, 2021, 5:51 pm ad1c9bdddf
    https://brainmass.com/statistics/sample-size-determination/sample-size-for-estimating-population-proportion-14961

    Solution Preview

    p= 60% =60/100= Those in favour of the party, assumed to be the population proportion
    q=1-p= 40% = 1 - 0.6= Those not in favour of the party

    sample proportion-population proportion(p)= 5% (since sampling error is to be less than 5 %)
    ...

    Solution Summary

    Sample size for estimating population proportion is calculated.

    $2.49

    ADVERTISEMENT