Answer:
15/2 or 7.5
Step-by-step explanation:
distribute 5/6 to each number
change the fraction 10/3 so that it will have the same denominator as 5/12
= 40/12
divide both sides by 5/6
I am pretty sure the answer is B
Answer:
The margin of error for a confidence interval for the population mean with a 90% confidence level is 0.53 hours.
Step-by-step explanation:
We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of .
So it is z with a pvalue of , so
Now, find the margin of error M as such
In which is the standard deviation of the population and n is the size of the sample.
In this quesstion:
So
The margin of error for a confidence interval for the population mean with a 90% confidence level is 0.53 hours.
The answer to the question is 7x+63