ELEMENTARY STATISTICS USING EXCEL SIXTH EDITION EXAM PREP 2026 QUESTION BANK AND ANSWER KEY MASTER STATISTICS SET

ELEMENTARY STATISTICS USING EXCEL
SIXTH EDITION EXAM PREP 2026
QUESTION BANK AND ANSWER KEY
MASTER STATISTICS SET

◉ Solve the problem.


Find the area under the standard normal curve between z = 0 and z
= 3.


0.4641
0.9987
0.0010
0.4987
Answer: 0.4987


◉ Find the area under the standard normal curve to the left of z =
1.25.


0.7682
0.8944

,0.1056
0.2318
Answer: 0.8944


◉ Solve the problem.


Find the area under the standard normal curve to the right of z = -
1.25.


0.7193
0.6978
0.5843
0.8944
Answer: 0.8944


◉ Solve the problem.


Use the standard normal distribution to find P(0 < z < 2.25).


0.5122
0.7888
0.4878

,0.8817
Answer: 0.4878


◉ Solve the problem.


Find the area of the indicated region under the standard normal
curve.


0.0968
0.0823
0.9032
0.9177
Answer: 0.9032


◉ Solve the problem.


IQ test scores are normally distributed with a mean of 99 and a
standard deviation of 11. An individual's IQ score is found to be 109.
Find the z-score corresponding to this value.


-1.10
0.91

, -0.91
1.10
Answer: 0.91


◉ Solve the problem.


The lengths of pregnancies of humans are normally distributed with
a mean of 268 days and a standard deviation of 15 days. A baby is
premature if it is born three weeks early. What percentage of babies
are born prematurely?


6.81%
8.08%
10.31%
9.21%
Answer: 8.08%


◉ Solve the problem.


The distribution of cholesterol levels in teenage boys is
approximately normal with mean= 170 and standard deviation= 30
(Source: U.S. National Center for Health Statistics). Levels above 200
warrant attention. Find the probability that a teenage boy has a
cholesterol level greater than 200.