Answer:
D) 239
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.
Required sample size:
Is n
n is found when
We have that
So
Simplifying by 6
We round up, and the answer is 239.
Answer:
3 complete shifts of 3/4 hour and 1 one-third of the 3/4 hour shift.
Step-by-step explanation:
Total work hours = 2.5 hours
Each shift = 0.75 hr
Number of shifts = Total work hours / Each shift
= 2.5 / 0.75
= 3.33
He worked for 3 complete shifts of 3/4 hour and
1 one-third of the 3/4 hour shift.
Step-by-step explanation:
the answer is A hope it's helpful