Statistics Final Exam 2025 –
Practice Questions and Key
Concepts REAL EXAM!!
At the beginning of the school year, a high school teacher asks every student in her classes to fill out a
survey that asks for their age, gender, their number of years they have lived at their current address,
their favorite school subject, and whether they plan to go to college after high school. Which of the
following best describes the types of variables that are being measured?
(a) five quantitative variables
(b) two categorical variables and two quantitative variables
(c) two categorical variables and three quantitative variables
(d) three categorical variables and two quantitative variables - ANSWER ✔---(d) three categorical
variables and two quantitative variables
The overall shape of this distribution is
(a) skewed to the right
(b) skewed to the left
(c) roughly symmetric
, (d) uniform - ANSWER ✔---(b) skewed to the left
The mean of the distribution (don't try to find it) is
(a) very close to the median
(b) clearly less than the median
(c) clearly greater than the median
(d) you can't say because the mean is random - ANSWER ✔---(b) clearly less than the median
Based on the shape of this distribution, what numerical measures would best describe it?
(a) The median and the IQR
(b) The mean and standard deviation
(c) The mean and the quartiles
(d) The median and the standard deviation - ANSWER ✔---(a) The median and the IQR
The pie chart above describes the distribution of favorite school subject for 300 high-school students.
The number of students whose favorite subject is math is:
(a) 26
(b) 45
(c) 60
(d) 78 - ANSWER ✔---(d) 78
Steve's boss told him that he did not deserve a raise and that Steve was making an amount similar to
other managers with his experience. Steve gathered some data and found that the z-score for his salary
as composed to other managers with the same level of experience is -1.35. Which of the following is the
best interpretation of this z-score?
(a) Steve makes 1.35% less than other managers with his experience level.
Practice Questions and Key
Concepts REAL EXAM!!
At the beginning of the school year, a high school teacher asks every student in her classes to fill out a
survey that asks for their age, gender, their number of years they have lived at their current address,
their favorite school subject, and whether they plan to go to college after high school. Which of the
following best describes the types of variables that are being measured?
(a) five quantitative variables
(b) two categorical variables and two quantitative variables
(c) two categorical variables and three quantitative variables
(d) three categorical variables and two quantitative variables - ANSWER ✔---(d) three categorical
variables and two quantitative variables
The overall shape of this distribution is
(a) skewed to the right
(b) skewed to the left
(c) roughly symmetric
, (d) uniform - ANSWER ✔---(b) skewed to the left
The mean of the distribution (don't try to find it) is
(a) very close to the median
(b) clearly less than the median
(c) clearly greater than the median
(d) you can't say because the mean is random - ANSWER ✔---(b) clearly less than the median
Based on the shape of this distribution, what numerical measures would best describe it?
(a) The median and the IQR
(b) The mean and standard deviation
(c) The mean and the quartiles
(d) The median and the standard deviation - ANSWER ✔---(a) The median and the IQR
The pie chart above describes the distribution of favorite school subject for 300 high-school students.
The number of students whose favorite subject is math is:
(a) 26
(b) 45
(c) 60
(d) 78 - ANSWER ✔---(d) 78
Steve's boss told him that he did not deserve a raise and that Steve was making an amount similar to
other managers with his experience. Steve gathered some data and found that the z-score for his salary
as composed to other managers with the same level of experience is -1.35. Which of the following is the
best interpretation of this z-score?
(a) Steve makes 1.35% less than other managers with his experience level.
