Straighterline Statistics Final Exam With Correct Answers|Verified
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? - ordinal
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
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? - ordinal
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
