# What is the z-score of sample X, if #n = 225, mu= 90, St. Dev. =90, and E[X] =78#?

##### 1 Answer

Jun 29, 2016

#### Explanation:

Z-Score

=

=

=

=

Plug into z-score formula.

Jun 29, 2016

Z-Score

=

=

=

=

Plug into z-score formula.

1335 views
around the world

You can reuse this answer

Creative Commons License

Creative Commons License