WorksheetsOpen Up Resources Unit 8 Test Review (Statistics)
Total questions: 50
Worksheet time: 57mins
12,10,10,10,13,12,11,13,10
5,11,2,12,4,2
4,2,7,4,3
Find the range of the data.
63, 71, 65, 66, 87, 53
32
33
34
35
Find the median, first quartile, third quartile, and interquartile range of the data.
32, 53, 72, 66, 47, 54, 49, 67, 71
Median: 54
First Quartile: 49
Third Quartile: 67
IQR: 18
Median: 54
First Quartile: 48
Third Quartile: 69
IQR: 21
Median: 54
First Quartile: 48
Third Quartile: 69
IQR: 22
Median: 54
First Quartile: 49
Third Quartile: 69
IQR: 20
58, 38, 54, 48, 26, 36
Complete the definition:
A _________ consists of all subjects (human or otherwise) that are being studied
Statistics
Number
People
Population
Pueblo
Complete the definition:
A _______ is a subset of a population
sample
sampel
people
statistics
group
Population or Sample?
A survey of 1353 American households found that 18% of the households own a computer.
Population
Sample
Population or Sample?
The average weight of every person entering the mall within 3 hour period was 146 lb.
Population
Sample
Which choice best represents a population?
Which choice best represents a sample?
A sample in which every person, object, or event has an equal chance of being selected.
A. Random sample.
B. Biased sample.
When a sample does not accurately represent the population it is a:
A. Unbiased sample
B. Biased sample
A public library asked every 10th person who entered to name the type of book they were getting.
A. Biased
B. Unbiased
Larger random sample sizes are more representative of a population.
A. True
B. False
A study is done to compare the fuel efficiency of cars. The first group of cars generally get about 37 miles per gallon. The second group of cars generally get about 37 miles per gallon. Based on the mean values of each group, what inference can be made?
The cars in group 2 generally are more fuel efficient.
The cars in group 1 generally are more fuel efficient.
The cars in group 1 and group 2 are equally fuel efficient.
No inferences can be made simply by knowing the mean.
Brazil asks 7 classmates how many erasers and pens they carry in their bags. The mean number of erasers is 10. The mean number of pens is 4. What inference could Brazil make using this data?
Most of Brazil's classmates carry more pens than erasers in their bags.
All of Brazil's classmates carry more erasers than pens in their bags.
Most of Brazil's classmates carry more erasers than pens in their bags.
Most of Brazil's classmates carry similar amounts of erasers and pens in their bags.
The dot plots show the weights of a random sample of fish from two lakes. Pick the statement that describes the variability of the samples.
The variability of the weights of the fish in Lake S is greater than the variability of the weights of the fish in Lake R.
The variability of the weights of the fish in the two lakes are about the same.
The variability of the weights of the fish in Lake R is greater than the variability of the weights of the fish in Lake S.
You cannot determine variability based on a dot plot.
The table shows the finish times of 30 runners in the 100-meter dash. Use the table to identify the inference that can be made by comparing the measures of center.
Every runner ran faster last year as compared to this year.
Most runners ran faster last year, on average, as compared to this year.
The runners ran faster this year, on average, as compared to last year.
Every runner ran faster this year as compared to last year.
If a data set is skewed, and most of the data are at the lower end of the data, which is a better measure of center? Explain.
The range; it would be smaller in a skewed data set.
The mode; it would have to be at the lower end of the data.
The mean; it is not affected by high or low data in a data set.
The median; it is less sensitive to outliers in a data set.
2, 57, 38, 42, 6
12, 5, 9, 18, 22, 25, 5
5, 0, 9, 9, 3, 0, 5, 5, 4
Find the range of the data.
16, 28, 6, 19, 21, 15, 22, 33, 17
18
27
30
12
Find the median, first quartile, third quartile, and interquartile range of the data.
203, 183, 212, 181, 157, 204, 189, 190
Median: 189
First Quartile: 182
Third Quartile: 203
IQR: 21
Median: 189.5
First Quartile: 182
Third Quartile: 203
IQR: 21
Median: 189
First Quartile: 182
Third Quartile: 203.5
IQR: 21.5
Median: 189.5
First Quartile: 182
Third Quartile: 203.5
IQR: 21.5
Population or Sample?
A recent survey of 2625 elementary school children found that 28% of the children could be classified obese.
Population
Sample
Population or Sample?
All of the teachers in a school are surveyed on their meeting time preferences.
Population
Sample
Which choice best represents the population?
Which choice best represents a sample?
Carlos wants to know the favorite sport of people at his school so he asks his baseball team.
A. Biased
B. Unbiased
A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.
Biased
Unbiased
Ana wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?
A. Thirty randomly selected students from her school
B. Thirty students who are rarely tardy
thirty of her friends
The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a biased sample?
A. The students will be selected from the choir.
B. The students will be selected randomly throughout the school.
If you compare the medians of each data set, who spends more time online?
Seventh graders
Eight graders
Both grades spend an equal amount of time online.
Impossible to determine form the data sets.
If both sets of data are symmetric, the most appropriate measure of center and variation to use are...
median & interquartile range
mean & interquartile range
median & mean absolute deviation
mean & mean absolute deviation
If one or both sets of data are not symmetric, the most appropriate measure of center and variation to use are...
median & interquartile range
mean & interquartile range
median & mean absolute deviation
mean & mean absolute deviation
The box plots shown are...
symmetric
not symmetric
The box-and-whisker plots show the points scored in each Super Bowl by the AFC and NFC. About how many points higher is the third quartile for the NFC than the third quartile for the AFC?
5 points
7 points
10 points
15 points
The double dot plots show the average wait times in minutes for two popular rides at an amusement park. Compare the measures of center and variation, which ride typically has a longer wait time?
No inference can be made from the graph.
Topsy Turvy
The wait times are the same for both rides.
Rocket Blast
Which box and whisker plot has the smaller median?
Top plot
Bottom plot
58, 38, 54, 48, 26, 36
Which statement is true?
Airplane A has a lesser median
Airplane B has a greater range
Airplane A has a less predictable flight length
Airplane B a lesser IQR
