Answer: 
You can write this as (-infinity, 7) if you aren't able to use the infinity symbol.
====================================================
Explanation:
Think of x < 7 as writing 
So x is between negative infinity and 7, excluding both endpoints.
To write
in interval notation, we write
The curved parenthesis tell us to exclude the endpoint.
Answer:
13.1148770486
.....................,...
Answer:
4 11/12
Step-by-step explanation:
Answer:
I,
Step-by-step explanation:
Answer:
We are given:

is the critical value at 0.02 significance level
is the margin of error
Therefore, the required sample size is:




Therefore, the required sample size n = 1061