Help please- Ty :DDD
2 answers:
You might be interested in
Answer:
B. 20
Step-by-step explanation:
<em>First, you divide by 5 from both sides of equation.</em>
<em></em>
<em>Simplify, to find the answer.</em>
<em></em>
<em>, which is our answer.</em>
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%