# Stats

posted by
**Megan** on
.

if 5% of all calculators are defective, find the mean, variance, and standard deviation of a lot of 400 calculators. round your final answer to two decimal places if necessary.

posted by
**Megan** on
.

if 5% of all calculators are defective, find the mean, variance, and standard deviation of a lot of 400 calculators. round your final answer to two decimal places if necessary.