
Add 7 to both sides

At the left hand side 7 will cancel 7
At the right hand side 7 will add up

Divide through by 2

simplify the fraction

IQR= 18 is the interquartile range of his scores.
Answer:
1,462.50
Step-by-step explanation:
6500
x.045
=292.50 per year
x. 5 years
=1,462.50
Answer:
The standard deviation of the sample mean is
Step-by-step explanation:
From the question we are told that
The mean is 
The standard deviation is 
The sample size is 
Generally the standard deviation of the sample mean is mathematically represented as

substituting values

