7.3 the central limit theorem

Question 1

central limit theorem

Answer 1

the sampling distribution of the sample mean (or x “bar”) is approximately normal for a large sample from any distribution

Question 2

determining when the central limit theorem is appropriate to use

Answer 2

when the sample size or n>30, means x “bar” has an approximately normal distribution. only used for populations with normal distribution

Question 3

calculating probabilities involving a sample mean on the ti-84 plus calc

Answer 3

use normalcdf, calculate the standard deviation, etc.