STRAIGHTERLINE STATISTICS FINAL
EXAM QUESTIONS AND ANSWERS
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 Answers -
ordinal
which of the following is an example of a nominal variable? - Correct Answers -gender
what sort of data are temperature measurements? - Correct Answers -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 Answers -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
Answers -$5.45
the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the sample
variance? - Correct Answers -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 Answers -
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 Answers -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 Answers -87
the table lists the populations and relative frequencies of car ownership in 4 neighboring
cities. which city has the most cars? - Correct Answers -westville
, in the figure shown, sample a and sample b have the same - Correct Answers -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? - Correct
Answers -54
which of these correlation coefficients shows the strongest linear relationship between 2
variables - Correct Answers --0.31
what conclusion can be drawn from the graph of average daily temperature and hot
beverage sales - Correct Answers -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 Answers -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 Answers -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 Answers -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 Answers -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 Answers -16%
Which type of data would have a discrete probability distribution? - Correct Answers -
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? - Correct Answers -10%
EXAM QUESTIONS AND ANSWERS
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 Answers -
ordinal
which of the following is an example of a nominal variable? - Correct Answers -gender
what sort of data are temperature measurements? - Correct Answers -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 Answers -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
Answers -$5.45
the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the sample
variance? - Correct Answers -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 Answers -
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 Answers -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 Answers -87
the table lists the populations and relative frequencies of car ownership in 4 neighboring
cities. which city has the most cars? - Correct Answers -westville
, in the figure shown, sample a and sample b have the same - Correct Answers -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? - Correct
Answers -54
which of these correlation coefficients shows the strongest linear relationship between 2
variables - Correct Answers --0.31
what conclusion can be drawn from the graph of average daily temperature and hot
beverage sales - Correct Answers -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 Answers -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 Answers -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 Answers -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 Answers -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 Answers -16%
Which type of data would have a discrete probability distribution? - Correct Answers -
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? - Correct Answers -10%
