The Z-score for Boris is 1.627, and the Z-score value for the Callie is 1.267, Boris scored higher relatively.
<h3>What is Z-test?</h3>
The Z test is a parametric procedure that is used on data that is dispersed in a normal fashion. For testing hypotheses, the z test can be used on one sample, two samples, or proportions. When the population variance is known, it analyzes if the means of two big groups are dissimilar.
We know the formula for the Z-test:

(a) For Boris:

Z = 1.627
(b) For Callie:

Z = 1.267
(c) Since the measures of two different data have been set to one measure and the value of the Z-score for Boris is higher relative to the Z-score value of Callie so Boris scored higher relatively.
Thus, the Z-score for Boris is 1.627, and the Z-score value for the Callie is 1.267, Boris scored higher relatively.
Learn more about the Z-test here:
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If a=0, then the denominator is equal to 0. Since you cannot divide by zero, you are not allowed to do this.
Answer:
60 people
Step-by-step explanation:
Set up a proportion:
= 
Cross multiply and solve for x:
18x = 1080
x = 60
So, 60 people would have a gym membership
Answer:
Step-by-step explanation:
5+n+4+7+n+8=360
24+2n=360
2n=360-24
2n=336
n=168
62.5% of 56 is 35
Divide 35 and 56:

Convert the decimal to a percentage: