Answer:
15
Step-by-step explanation:
You should google the worksheet that this is from, easier results.
The margin of error of the random selection is 0.29
The given parameters are:
--- the sample size
--- the standard deviation
--- the mean
--- the confidence level.
The margin of error (E) is calculated as follows:
So, we have:
The z-value for 90% confidence level is 1.645.
Substitute 1.645 for z
Take square roots
Multiply
Approximate
Hence, the margin of error is 0.29
Read more about margin of error at:
brainly.com/question/14396648
Answer:
4 dollars and 20 cents
Step-by-step explanation:
5.00-.80=4.20