Well using mental math, subtract .04 from 1.6 to get 1.56, which is s
Answer:
D
Step-by-step explanation:
I dont think this needs explained
Use the formula of a distance between two points:


Answer:
4.4% of the population with IQ between 120 and 125.
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = 100
Standard Deviation, σ = 15
We are given that the distribution of IQ scores is a bell shaped distribution that is a normal distribution.
a) Let X be a person's IQ score.
Then, density functions for IQ scores is given by:

b) P(population with IQ between 120 and 125.)
Formula:



12/4 = 3 + 2x 1/2
Divide and then multiply and your answer will be 4