Answer:
The <em>z</em>-score for a a class with 21 students is <u>-1.33</u>.
Step-by-step explanation:
The <em>z</em>-score of a raw <em>X</em> is computed by subtracting the mean of a distribution from the raw score <em>X</em> and dividing the result by the standard deviation of the distribution.
The <em>z</em>-scores are standardized scores and follow a Standard normal distribution.
Given:
μ = 38.1
σ = 12.9
<em>X</em> = 21
Compute the <em>z</em>-score for the raw score <em>X</em> as follows:

Thus, the <em>z</em>-score for a a class with 21 students is <u>-1.33</u>.
Answer:
$9 an hr.
Step-by-step explanation:
4 1/4 + 1 3/4 = 6
= 6hrs combined.
$54 = 54/6 = 9
=$9 an hr.
Answer:
short sale
Step-by-step explanation:
Answer:
QR = 5
Step-by-step explanation:
Since the parallelograms are similar, then the ratios of corresponding sides are equal, that is
=
, then
=
( cross- multiply )
9QR = 45 ( divide both sides by 9 )
QR = 5