Straighterline Statistics Final Exam
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? - ✔✔ correct answer ordinal
which of the following is an example of a nominal variable? - ✔✔ correct answer gender
what sort of data are temperature measurements? - ✔✔ correct answer ratio
based on the graph, which statement best describes the relationship between daily high
temperatures and the number of people going to the beach? - ✔✔ correct answer 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? - ✔✔ correct answer $5.45
the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the sample variance? - ✔✔
correct answer 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? - ✔✔ correct answer 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? - ✔✔ correct answer 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 - ✔✔
correct answer 87
the table lists the populations and relative frequencies of car ownership in 4 neighboring cities.
which city has the most cars? - ✔✔ correct answer westville
in the figure shown, sample a and sample b have the same - ✔✔ correct answer median
, Straighterline Statistics Final Exam
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? - ✔✔ correct answer 54
which of these correlation coefficients shows the strongest linear relationship between 2 variables -
✔✔ correct answer -0.31
what conclusion can be drawn from the graph of average daily temperature and hot beverage sales -
✔✔ correct answer 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 - ✔✔ correct
answer 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 - ✔✔ correct answer 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 - ✔✔ correct answer 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? - ✔✔ correct answer 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? - ✔✔ correct answer 16%
Which type of data would have a discrete probability distribution? - ✔✔ correct answer 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
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? - ✔✔ correct answer ordinal
which of the following is an example of a nominal variable? - ✔✔ correct answer gender
what sort of data are temperature measurements? - ✔✔ correct answer ratio
based on the graph, which statement best describes the relationship between daily high
temperatures and the number of people going to the beach? - ✔✔ correct answer 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? - ✔✔ correct answer $5.45
the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the sample variance? - ✔✔
correct answer 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? - ✔✔ correct answer 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? - ✔✔ correct answer 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 - ✔✔
correct answer 87
the table lists the populations and relative frequencies of car ownership in 4 neighboring cities.
which city has the most cars? - ✔✔ correct answer westville
in the figure shown, sample a and sample b have the same - ✔✔ correct answer median
, Straighterline Statistics Final Exam
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? - ✔✔ correct answer 54
which of these correlation coefficients shows the strongest linear relationship between 2 variables -
✔✔ correct answer -0.31
what conclusion can be drawn from the graph of average daily temperature and hot beverage sales -
✔✔ correct answer 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 - ✔✔ correct
answer 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 - ✔✔ correct answer 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 - ✔✔ correct answer 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? - ✔✔ correct answer 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? - ✔✔ correct answer 16%
Which type of data would have a discrete probability distribution? - ✔✔ correct answer 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
