Jayden spends a lot of time studying charts of stocks past performance, but his investment return are only average. This outcome supports

When the data points are scattered, variance is small

Indicate whether the statement is true or false

If a manager believes that the required sample size is too large for a situation in which she desires to estimate the mean income of blue collar workers in a state, which of the following would lead to a reduction in sample size?

A) Reduce the level of confidence B) Allow a higher margin of error C) Somehow reduce the variation in the population D) All of the above