StraighterLine Statistics Final UPDATED ACTUAL
Exam Question and Answer (2026/2027) | A+
Verified
• which of the following is an example of a nominal variable? -✓✓ gender
• what sort of data are temperature measurements? -✓✓ ratio
• based on the graph, which statement best describes the relationship between daily
high temperatures and the number of people going to the beach? -✓✓ 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? -✓✓
$5.45
• the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the
sample variance? -✓✓ 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? -✓✓
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? -✓✓ 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 -✓✓ 87
• the table lists the populations and relative frequencies of car ownership in 4
neighboring cities. which city has the most cars? -✓✓ westville
• in the figure shown, sample a and sample b have the same -✓✓ 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? -✓✓ 54
• which of these correlation coefficients shows the strongest linear relationship
between 2 variables -✓✓ -0.31
• what conclusion can be drawn from the graph of average daily temperature and
hot beverage sales -✓✓ 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 -✓✓ 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 -✓✓ 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 -✓✓
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? -✓✓ 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? -✓✓ 16%
Exam Question and Answer (2026/2027) | A+
Verified
• which of the following is an example of a nominal variable? -✓✓ gender
• what sort of data are temperature measurements? -✓✓ ratio
• based on the graph, which statement best describes the relationship between daily
high temperatures and the number of people going to the beach? -✓✓ 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? -✓✓
$5.45
• the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the
sample variance? -✓✓ 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? -✓✓
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? -✓✓ 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 -✓✓ 87
• the table lists the populations and relative frequencies of car ownership in 4
neighboring cities. which city has the most cars? -✓✓ westville
• in the figure shown, sample a and sample b have the same -✓✓ 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? -✓✓ 54
• which of these correlation coefficients shows the strongest linear relationship
between 2 variables -✓✓ -0.31
• what conclusion can be drawn from the graph of average daily temperature and
hot beverage sales -✓✓ 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 -✓✓ 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 -✓✓ 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 -✓✓
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? -✓✓ 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? -✓✓ 16%
