Test 1 Review Statistics online
Which of the following correctly describes the relationship between a parameter and a
statistic?
A parameter is calculated from sample data and is generally used to estimate a statistic.
A study was done to determine the average commute time per week to and from class for an
SPC student attending a lecture class. For convenience, a sample of 60 students was taken by
randomly selecting a lecture class on the Gibbs campus (30 students), and also a lecture class
on the Clearwater campus (30 students). The students selected for the sample were then
asked where they were commuting from, when, and how often. The information was then
entered into a GPS system in order to obtain estimated commuting times.
All SPC students who attend lecture classes.
Which branch of statistics deals with the organization and summarization of collected
information?
descriptive
From past figures, it is predicted that 19% of the registered voters in California will vote in the
June primary.
inferential
The cost of a Statistics textbook.
quantitative
Eye color
qualitative
A study where a drug was given to 23 patients and a placebo to another group of 23 patients
to determine if the drug has an effect on a patient's illness.
Experiment
A study where a political pollster wishes to determine if his candidate is leading in the polls
for an upcoming election.
Observational study
50 sophomores, 30 juniors and 20 seniors are randomly selected from 500 sophomores, 300
juniors and 200 seniors at a certain high school.
,Stratified (big to small)
Every fifth person boarding a plane is searched thoroughly.
Systematic (system of everyone)
At a local community college, five statistics classes are randomly selected out of 20 and all of
the students from each class are interviewed.
Random
A community college student interviews everyone in a statistics class to determine the
percentage of students that own a car.
Convenience
A fitness instructor measured the heart rates of the participants in a yoga class at the
conclusion of the class. The data is summarized in the histogram below. There were fifteen
people who participated in the class between the ages of 25 and 45. What percent of
participants had a heart rate between 130 and 150 bpm?
47
Find mean
The heights (in inches) of ten randomly chosen American males are shown below.
71 67 67 72 76 72 73 68 72 72
71 (add all up and divide by amount)
Find median
The heights (in inches) of ten randomly chosen American males are shown below.
67 67 68 71 72 72 72 72 73 76
72 (least to greatest then add the middle and divide)
Find mode
The heights (in inches) of ten randomly chosen American males are shown below.
71 67 67 72 76 72 73 68 72 72
72 (mode=most)
The median LSAT score reported by a Law School is 170. Which of the following is not correct?
half of the students have an LSAT score of 170
Identify the overall shape of the distribution and determine whether the mean or the median
would provide a better measure of center.
,The ages of a group of patients being treated at one hospital for osteoporosis are summarized
in the frequency histogram below.
Skew left, the median would provide a better measure of center
Find range
Here are costs (in dollars) of 12 electric smooth top ranges.
860 1000 650 560 1460 1100
700 760 870 1300 550 1060
1460-550=910 (subtract the lowest from highest)
Find the sample standard deviation. The heights (in inches) of ten randomly chosen American
males are shown below.
71 67 67 72 76 72 73 68 72 72
2.72 (stat 1-var on calc.)
Which of the three histograms shown summarizes the data set with the smallest standard
deviation?
2 (smaller amount)
Lengths of pregnancies of humans are normally distributed with a mean of 265 days and a
standard deviation of 10 days. Use the Empirical Rule to determine the percentage of women
whose pregnancies are between 255 and 275 days.
68%
Determine the 5 number summary of the data set
The heights (in inches) of ten randomly chosen American males are shown below.
71 67 67 72 76 72 73 68 72 72
67, 68, 72, 72, 76
(lowest and highest, median, and the lowest/highest quartiles)
The age at which a person purchased a new BMW is summarized in the following boxplot.
For which series was the median age of purchase equal to 41?
The 5 series.
Use z-scores to make the following comparison.
A high school student took two college entrance exams and scored 1120 on the SAT and 27 on
the ACT. Suppose that SAT scores have a mean of 950 and a standard deviation of 140 while
the ACT scores have a mean of 22 and a standard deviation of 4. Assuming that the
, performance on both tests follows a normal distribution, determine which test the student
did better on.
SAT ZSCORE= 1.21
ACT ZSCORE= 1.25
ACT has the highest zscore.
Test 1 Review (Statistics online)
Which of the following correctly describes the relationship between a parameter and a
statistic?
A parameter is calculated from sample data and is generally used to estimate a statistic.
A study was done to determine the average commute time per week to and from class for an
SPC student attending a lecture class. For convenience, a sample of 60 students was taken by
randomly selecting a lecture class on the Gibbs campus (30 students), and also a lecture class
on the Clearwater campus (30 students). The students selected for the sample were then
asked where they were commuting from, when, and how often. The information was then
entered into a GPS system in order to obtain estimated commuting times.
All SPC students who attend lecture classes.
Which branch of statistics deals with the organization and summarization of collected
information?
descriptive
From past figures, it is predicted that 19% of the registered voters in California will vote in the
June primary.
inferential
The cost of a Statistics textbook.
quantitative
Eye color
qualitative
A study where a drug was given to 23 patients and a placebo to another group of 23 patients
to determine if the drug has an effect on a patient's illness.
Experiment
Which of the following correctly describes the relationship between a parameter and a
statistic?
A parameter is calculated from sample data and is generally used to estimate a statistic.
A study was done to determine the average commute time per week to and from class for an
SPC student attending a lecture class. For convenience, a sample of 60 students was taken by
randomly selecting a lecture class on the Gibbs campus (30 students), and also a lecture class
on the Clearwater campus (30 students). The students selected for the sample were then
asked where they were commuting from, when, and how often. The information was then
entered into a GPS system in order to obtain estimated commuting times.
All SPC students who attend lecture classes.
Which branch of statistics deals with the organization and summarization of collected
information?
descriptive
From past figures, it is predicted that 19% of the registered voters in California will vote in the
June primary.
inferential
The cost of a Statistics textbook.
quantitative
Eye color
qualitative
A study where a drug was given to 23 patients and a placebo to another group of 23 patients
to determine if the drug has an effect on a patient's illness.
Experiment
A study where a political pollster wishes to determine if his candidate is leading in the polls
for an upcoming election.
Observational study
50 sophomores, 30 juniors and 20 seniors are randomly selected from 500 sophomores, 300
juniors and 200 seniors at a certain high school.
,Stratified (big to small)
Every fifth person boarding a plane is searched thoroughly.
Systematic (system of everyone)
At a local community college, five statistics classes are randomly selected out of 20 and all of
the students from each class are interviewed.
Random
A community college student interviews everyone in a statistics class to determine the
percentage of students that own a car.
Convenience
A fitness instructor measured the heart rates of the participants in a yoga class at the
conclusion of the class. The data is summarized in the histogram below. There were fifteen
people who participated in the class between the ages of 25 and 45. What percent of
participants had a heart rate between 130 and 150 bpm?
47
Find mean
The heights (in inches) of ten randomly chosen American males are shown below.
71 67 67 72 76 72 73 68 72 72
71 (add all up and divide by amount)
Find median
The heights (in inches) of ten randomly chosen American males are shown below.
67 67 68 71 72 72 72 72 73 76
72 (least to greatest then add the middle and divide)
Find mode
The heights (in inches) of ten randomly chosen American males are shown below.
71 67 67 72 76 72 73 68 72 72
72 (mode=most)
The median LSAT score reported by a Law School is 170. Which of the following is not correct?
half of the students have an LSAT score of 170
Identify the overall shape of the distribution and determine whether the mean or the median
would provide a better measure of center.
,The ages of a group of patients being treated at one hospital for osteoporosis are summarized
in the frequency histogram below.
Skew left, the median would provide a better measure of center
Find range
Here are costs (in dollars) of 12 electric smooth top ranges.
860 1000 650 560 1460 1100
700 760 870 1300 550 1060
1460-550=910 (subtract the lowest from highest)
Find the sample standard deviation. The heights (in inches) of ten randomly chosen American
males are shown below.
71 67 67 72 76 72 73 68 72 72
2.72 (stat 1-var on calc.)
Which of the three histograms shown summarizes the data set with the smallest standard
deviation?
2 (smaller amount)
Lengths of pregnancies of humans are normally distributed with a mean of 265 days and a
standard deviation of 10 days. Use the Empirical Rule to determine the percentage of women
whose pregnancies are between 255 and 275 days.
68%
Determine the 5 number summary of the data set
The heights (in inches) of ten randomly chosen American males are shown below.
71 67 67 72 76 72 73 68 72 72
67, 68, 72, 72, 76
(lowest and highest, median, and the lowest/highest quartiles)
The age at which a person purchased a new BMW is summarized in the following boxplot.
For which series was the median age of purchase equal to 41?
The 5 series.
Use z-scores to make the following comparison.
A high school student took two college entrance exams and scored 1120 on the SAT and 27 on
the ACT. Suppose that SAT scores have a mean of 950 and a standard deviation of 140 while
the ACT scores have a mean of 22 and a standard deviation of 4. Assuming that the
, performance on both tests follows a normal distribution, determine which test the student
did better on.
SAT ZSCORE= 1.21
ACT ZSCORE= 1.25
ACT has the highest zscore.
Test 1 Review (Statistics online)
Which of the following correctly describes the relationship between a parameter and a
statistic?
A parameter is calculated from sample data and is generally used to estimate a statistic.
A study was done to determine the average commute time per week to and from class for an
SPC student attending a lecture class. For convenience, a sample of 60 students was taken by
randomly selecting a lecture class on the Gibbs campus (30 students), and also a lecture class
on the Clearwater campus (30 students). The students selected for the sample were then
asked where they were commuting from, when, and how often. The information was then
entered into a GPS system in order to obtain estimated commuting times.
All SPC students who attend lecture classes.
Which branch of statistics deals with the organization and summarization of collected
information?
descriptive
From past figures, it is predicted that 19% of the registered voters in California will vote in the
June primary.
inferential
The cost of a Statistics textbook.
quantitative
Eye color
qualitative
A study where a drug was given to 23 patients and a placebo to another group of 23 patients
to determine if the drug has an effect on a patient's illness.
Experiment
