STRAIGHTERLINE STATISTICS FINAL EXAM STUDY GUIDE | COMPLETE EXAM
REVIEW QUESTIONS AND ANSWERS 2026/2027
Anais is organizing her rock collection and places each rock in one of three categories: small, medium, or
large. this illustrates what level of measurement? - ANS ✔✔ordinal
which of the following is an example of a nominal variable? - ANS ✔✔gender
what sort of data are temperature measurements? - ANS ✔✔ratio
based on the graph, which statement best describes the relationship between daily high temperatures
and the number of people going to the beach? - ANS ✔✔it is negative linear relationship
the table shows the number of train tickets carl purchased to each station over the last month and the
fare to each station. what was the average cost per ride? - ANS ✔✔$5.45
the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the sample variance? - ANS
✔✔11.6
jason collects information about annual family income from each student at his college. he computes
both the mean and median family income across all students and is surprised to find that the mean
income is higher than the median income. what is the most likely reason for the difference in the mean
and the median? - ANS ✔✔the mean is more affected by a small number of extreme values
an instructor administers a test to a class of 30 students and observes that the scores are close to
normally distributed with a mean score of 40 and a standard deviation of 10. what can you conclude
from these results? - ANS ✔✔the average student scored at the 40th percentile
laura's quiz scores during the semester were 87, 82, 90, 92, and 84. what was her mean score - ANS
✔✔87
the table lists the populations and relative frequencies of car ownership in 4 neighboring cities. which
city has the most cars? - ANS ✔✔westville
in the figure shown, sample a and sample b have the same - ANS ✔✔median
the contingency table describes the living arrangements of students at a small college. what percentage
of the students are women who live in off-campus housing? - ANS ✔✔54
which of these correlation coefficients shows the strongest linear relationship between 2 variables - ANS
✔✔-0.31
what conclusion can be drawn from the graph of average daily temperature and hot beverage sales - ANS
✔✔there is a negative correlation between average daily temperature and hot beverage sales
the coefficient of correlation r is a measurement of statistical relationships that are - ANS ✔✔linear
, a bag contains marbles of different colors (red, yellow, and blue) and different sizes (small and large). the
probability of picking a blue marble out of the bag is 0.10 and the probability of picking a large marble is
0.50. what is the probability of picking a large blue marble - ANS ✔✔0.05
a swimmer, sarah, hopes to compete in an upcoming meet. there are 8 team members eligible for the
breaststroke event at the meet, but only 1 team member will be randomly selected to compete in that
event. there are 4 team members eligible for the butterfly event at the meet, but only 1 team member
will be randomly selected to compete in that event. sarah is eligible to compete in both events. what is
her chance of being selected for at least one of the two events - ANS ✔✔3 in 8
The graduating class of a small college has 170 men and 195 women. If grades and gender are
independent, what is the probability that students with the two highest grade averages will be both
women? - ANS ✔✔0.28
A high school student applies to both the naval Academy and West Point. The diagram shows his chances
of being accepted to each school and the chance that he will be accepted to both. What is the
probability that he will be accepted to at least one of the two schools? - ANS ✔✔16%
Which type of data would have a discrete probability distribution? - ANS ✔✔Number of children per
household in a census
A video game got a thumbs up rating from 400 out of 1000 customer surveyed. The customers included
250 women. Assuming that gender does not have any influence on the rating, what is the chance that
any randomly selected participant will be a woman who gave the game a thumbs up rating? - ANS
✔✔10%
A dining guide reviewed all of the restaurants in a town. Only six restaurants received a four star rating.
17 receive three stars; 18 receive two stars; and nine received a one star rating. Based on this
information, what is the probability of a restaurant receiving a four star rating? - ANS ✔✔0.12
The table shows the likelihood that a team will score a certain number of touchdowns in a football game.
What is the probability that the team will score at least two touchdowns? - ANS ✔✔0.64
The main score on a college entrance exam is 1200, and the standard deviation is 100. If the scores are
normally distributed, what is the likelihood of the score greater than 1450? - ANS ✔✔0.0062
What type of distribution is depicted in the graph? - ANS ✔✔Normal
A school gives an exam for which the scores are normally distributed. What proportion of students score
within 2.3 standard deviations of the mean? - ANS ✔✔0.98
The mean score for 18 holes of golf on the parkvale municipal course is 68, with a standard deviation of
12. Low score is 95. What is Z - score does this correspond to? - ANS ✔✔2.25
Damien determines that the difference is he found in his study are statistically significant at the 0.05
level of significance. What is the correct interpretation of the finding? - ANS ✔✔95% of the study
participants achieve the level of performance expected
REVIEW QUESTIONS AND ANSWERS 2026/2027
Anais is organizing her rock collection and places each rock in one of three categories: small, medium, or
large. this illustrates what level of measurement? - ANS ✔✔ordinal
which of the following is an example of a nominal variable? - ANS ✔✔gender
what sort of data are temperature measurements? - ANS ✔✔ratio
based on the graph, which statement best describes the relationship between daily high temperatures
and the number of people going to the beach? - ANS ✔✔it is negative linear relationship
the table shows the number of train tickets carl purchased to each station over the last month and the
fare to each station. what was the average cost per ride? - ANS ✔✔$5.45
the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the sample variance? - ANS
✔✔11.6
jason collects information about annual family income from each student at his college. he computes
both the mean and median family income across all students and is surprised to find that the mean
income is higher than the median income. what is the most likely reason for the difference in the mean
and the median? - ANS ✔✔the mean is more affected by a small number of extreme values
an instructor administers a test to a class of 30 students and observes that the scores are close to
normally distributed with a mean score of 40 and a standard deviation of 10. what can you conclude
from these results? - ANS ✔✔the average student scored at the 40th percentile
laura's quiz scores during the semester were 87, 82, 90, 92, and 84. what was her mean score - ANS
✔✔87
the table lists the populations and relative frequencies of car ownership in 4 neighboring cities. which
city has the most cars? - ANS ✔✔westville
in the figure shown, sample a and sample b have the same - ANS ✔✔median
the contingency table describes the living arrangements of students at a small college. what percentage
of the students are women who live in off-campus housing? - ANS ✔✔54
which of these correlation coefficients shows the strongest linear relationship between 2 variables - ANS
✔✔-0.31
what conclusion can be drawn from the graph of average daily temperature and hot beverage sales - ANS
✔✔there is a negative correlation between average daily temperature and hot beverage sales
the coefficient of correlation r is a measurement of statistical relationships that are - ANS ✔✔linear
, a bag contains marbles of different colors (red, yellow, and blue) and different sizes (small and large). the
probability of picking a blue marble out of the bag is 0.10 and the probability of picking a large marble is
0.50. what is the probability of picking a large blue marble - ANS ✔✔0.05
a swimmer, sarah, hopes to compete in an upcoming meet. there are 8 team members eligible for the
breaststroke event at the meet, but only 1 team member will be randomly selected to compete in that
event. there are 4 team members eligible for the butterfly event at the meet, but only 1 team member
will be randomly selected to compete in that event. sarah is eligible to compete in both events. what is
her chance of being selected for at least one of the two events - ANS ✔✔3 in 8
The graduating class of a small college has 170 men and 195 women. If grades and gender are
independent, what is the probability that students with the two highest grade averages will be both
women? - ANS ✔✔0.28
A high school student applies to both the naval Academy and West Point. The diagram shows his chances
of being accepted to each school and the chance that he will be accepted to both. What is the
probability that he will be accepted to at least one of the two schools? - ANS ✔✔16%
Which type of data would have a discrete probability distribution? - ANS ✔✔Number of children per
household in a census
A video game got a thumbs up rating from 400 out of 1000 customer surveyed. The customers included
250 women. Assuming that gender does not have any influence on the rating, what is the chance that
any randomly selected participant will be a woman who gave the game a thumbs up rating? - ANS
✔✔10%
A dining guide reviewed all of the restaurants in a town. Only six restaurants received a four star rating.
17 receive three stars; 18 receive two stars; and nine received a one star rating. Based on this
information, what is the probability of a restaurant receiving a four star rating? - ANS ✔✔0.12
The table shows the likelihood that a team will score a certain number of touchdowns in a football game.
What is the probability that the team will score at least two touchdowns? - ANS ✔✔0.64
The main score on a college entrance exam is 1200, and the standard deviation is 100. If the scores are
normally distributed, what is the likelihood of the score greater than 1450? - ANS ✔✔0.0062
What type of distribution is depicted in the graph? - ANS ✔✔Normal
A school gives an exam for which the scores are normally distributed. What proportion of students score
within 2.3 standard deviations of the mean? - ANS ✔✔0.98
The mean score for 18 holes of golf on the parkvale municipal course is 68, with a standard deviation of
12. Low score is 95. What is Z - score does this correspond to? - ANS ✔✔2.25
Damien determines that the difference is he found in his study are statistically significant at the 0.05
level of significance. What is the correct interpretation of the finding? - ANS ✔✔95% of the study
participants achieve the level of performance expected
