Given the scores on a statewide standardized test are normally distributed
Mean = μ = 78
Standard deviation = σ = 3
Normalize the data using the z-score by using the following formula and chart:

Estimate the percentage of scores of the following cases:
(a) between 75 and 81
so, the z-score for the given numbers will be:

As shown, the percentage when (-1 < z < 1) = 68%
(b) above 87

The percentage when (z > 3) = 0.5%
(c) below 72

The percentage when (z < -2) = 0.5 + 2 = 2.5%
(d) between 75 and 84

The percentage when ( -1 < z < 2 ) = 68 + 13.5 = 81.5%
Answer:
<u>y-intercept</u><u> </u><u>is</u><u> </u><u>0</u><u>,</u><u> </u><u>x-intercept</u><u> </u><u>is</u><u> </u><u>0</u><u> </u><u>and</u><u> </u><u>1</u>
Step-by-step explanation:
For y-intercept, x=0 :

For x-intercept, y=0 :

Answer:
(- 1, 4 )
Step-by-step explanation:
x = 1 is a vertical line passing through all points with an x- coordinate of 1
The point P(3, 4) is to units to the right of x = 1.
Hence the refection will be 2 units to the left of x = 1
P' = (1 - 2, 4 ) = (- 1, 4 )
Answer:
-40 i think
Step-by-step explanation:
The answer is. looks like c is the trig answer