Straighterline Statistics Final Exam
Questions & 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 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
, 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
A researcher wants to test the hypothesis that right handed people will have different
visual, acuity, and their left and right eyes. What sort of test should the researcher use?
- correct Answer-One tailed test with two independent samples
To test the effectiveness of a new therapy, a researcher compares the Helt outcomes of
45 patients who receive the therapy and 38 patients in a control condition. In a two
tailed test, the researcher obtains a T statistic of 1.83. What is the strictest threshold at
which this result could be considered significant? - correct Answer-P<0.001
A researcher is conducting a study comparing the effects of drug treatments on hours of
sleep across three groups. Group one is taking drug a, group 2 is taking rugby, and
group 3 is a control group not taking any drug. What statistic would be most appropriate
to compare the main number of hours of sleep across the three groups. - correct
Answer-Analysis of variance
What does the denominator represent in the formula for an F statistic used in an
ANOVA - correct Answer-Variation within treatment groups
What is one way that the F statistic differs from the T statistic? - correct Answer-It can
never be negative
Questions & 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 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
, 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
A researcher wants to test the hypothesis that right handed people will have different
visual, acuity, and their left and right eyes. What sort of test should the researcher use?
- correct Answer-One tailed test with two independent samples
To test the effectiveness of a new therapy, a researcher compares the Helt outcomes of
45 patients who receive the therapy and 38 patients in a control condition. In a two
tailed test, the researcher obtains a T statistic of 1.83. What is the strictest threshold at
which this result could be considered significant? - correct Answer-P<0.001
A researcher is conducting a study comparing the effects of drug treatments on hours of
sleep across three groups. Group one is taking drug a, group 2 is taking rugby, and
group 3 is a control group not taking any drug. What statistic would be most appropriate
to compare the main number of hours of sleep across the three groups. - correct
Answer-Analysis of variance
What does the denominator represent in the formula for an F statistic used in an
ANOVA - correct Answer-Variation within treatment groups
What is one way that the F statistic differs from the T statistic? - correct Answer-It can
never be negative
