Answer:
The probability that the sample mean will lie within 2 values of μ is 0.9544.
Step-by-step explanation:
Here
- the sample size is given as 100
- the standard deviation is 10
The probability that the sample mean lies with 2 of the value of μ is given as

Here converting the values in z form gives

Substituting values

From z table

So the probability that the sample mean will lie within 2 values of μ is 0.9544.
I think this answers all the parts
Hope this helped :)
Answer: Top right and left are ACUTE, Bottom right is RIGHT, and bottom left is OBTUSE.
Well first, you need to solve within the parentheses. You would get 23.8 - 14 - 8.6
Then you would subtract them in order, and your answer would be 1.2