If a researcher is interested in having a group of 100 people complete a survey and she plans to calculate a variance estimate and standard deviation estimate for that group,how can she increase her degrees of freedom before she does her calculations?
A)Do not use a correction in the denominator of the variance calculation.
B)Have more than 100 people complete the survey.
C)Reduce variability of the sample by collecting information from a homogeneous group.
D)Include a mean square calculation for the standard deviation estimate.

Question

Quizplus · Accepted Answer

Degrees of freedom are directly proportional to the sample size. Having more than 100 people complete the survey will increase the degrees of freedom, thus allowing for a more accurate variance estimate and standard deviation estimate.

If a Researcher Is Interested in Having a Group of 100