The value chosen in Step 1 determines the confidence level of your results. It tells you how often the true percentage of the population would fall within the confidence interval of results obtained in your survey. For most marketing research studies, a confidence level of 95% is used.
Confidence level is related to the level of significance (α ). A 95% Confidence level corresponds to α = .05. If the Level of significance (α) = .05, that means that there is one chance in twenty that the true population mean falls outside the range given.
This is the number of respondents who answered the question.
This is the mean response given by respondents in the sample.
This is the standard deviation of the mean entered at Step 3.
It is assumed that your sample represents a random sample of the relevant population. |