A research team recorded the total length (in cm) of 40 adult blue sharks. The measurements are shown in the table and summarized in the histogram below:Based on the shape of the distribution of the variable “Length” from the given histogram, what must be true about the sample size in order for the distribution of the sample mean xˉ\bar{x} to be approximately normal?

The sample size must be considerably larger than 3030

Any sample size works; the sampling distribution of the mean is always normal

The sample size must be exactly 3030

The sample size must be 3030 or smaller

A research team recorded the total length (in cm) of 40 adult blu...

Determining the Minimum Sample Size Required: Videos & Practice Problems