To solve for proportion we make use of the z statistic.
The procedure is to solve for the value of the z score and then locate for the
proportion using the standard distribution tables. The formula for z score is:
z = (X – μ) / σ
where X is the sample value, μ is the mean value and σ is
the standard deviation
when X = 70
z1 = (70 – 100) / 15 = -2
Using the standard distribution tables, proportion is P1
= 0.0228
when X = 130
z2 = (130 – 100) /15 = 2
Using the standard distribution tables, proportion is P2
= 0.9772
Therefore the proportion between X of 70 and 130 is:
P (70<X<130) = P2 – P1
P (70<X<130) = 0.9772 - 0.0228
P (70<X<130) = 0.9544
Therefore 0.9544 or 95.44% of the test takers scored
between 70 and 130.
f(-10) = 4
f(-2) = 4
Since y is constant while x isnt we just dont need to put x
f(x) = 4
Answer:
A) TA
Step-by-step explanation:
A radius goes from the center of a circle to the outside edge.
RP connects two points on the outside edge of the circle without going through the center. This is not a radius.
TR connects two opposite points on the outside edge of the circle while going through the center. This is a diameter, not a radius.
GP connects two opposite points on the outside edge of the circle while going through the center. This is a diameter, not a radius.
TA connects the center of the circle to the outside edge. This is a radius.