A set of data has a normal distribution with a mean of 5.1 and a standard deviation of 0.9. Find the percent of data between 4.2 and 5.1.
Answer: The correct option is B) about 34%
Proof:
We have to find 
To find
, we need to use z score formula:
When x = 4.2, we have:


When x = 5.1, we have:


Therefore, we have to find 
Using the standard normal table, we have:
= 

or 34.13%
= 34% approximately
Therefore, the percent of data between 4.2 and 5.1 is about 34%
$5.5
Step-by-step explanation:
½ × 11.00
5.5
Hope this helps. Have a good day!
1. -2<2 2. -4> -5. -20<20. -7>-8. -10<-1. 50>-100
Divide total pain by number of books.
296/8 = 37
He paid $37 per book