Answer:
0.658 is the probability that a sample 90 test takers will provide a sample mean test score within 10 points of the population mean of 502.
Step-by-step explanation:
The following information is missing:
The standard deviation of population is 100.
We are given the following information in the question:
Population mean, μ = 502
Standard Deviation, σ = 100
Sample size, n = 90
Standard error =

Formula:

P(test score within 10 points)


0.658 is the probability that a sample 90 test takers will provide a sample mean test score within 10 points of the population mean of 502.
Answer:

Step-by-step explanation:
Move
to the denominator in 
using the negative exponent rule 
Answer:
265
Step-by-step explanation: Used a Calculator
Answer:
6
Step-by-step explanation:
2:5, 4:10, 6:15
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