AnswersGrade 7 MathematicsSampling and Comparing Populations

Sampling and Comparing Populations — Test Answers

24 verified answers1 views
1
Free Preview

Which animal shelter has the dog that weighs the least?

A
Both shelters have a dog with the lowest weight of 10 pounds.
B
shelter B
C
Both shelters have a dog with the lowest weight of 8 pounds.
D
shelter A
2
Free Preview

Which correctly compares the ranges of the data?

A
The range in shelter A is 22, and the range in shelter B is 18.
B
The range in shelter A is 20, and the range in shelter B is 10.
C
The range in shelter A is 13, and the range in shelter B is 8.
D
The range in shelter A is 11, and the range in shelter B is 4.
3

About 50 percent of Theo’s scores are in which range for each subject?

A
55 to 60 for math; 50 to 60 for language arts
B
55 to 90 for math; 50 to 90 for language arts
C
85 to 90 for math; 80 to 90 for language arts
D
60 to 85 for math; 60 to 80 for language arts
4

Which statement compares the shape of the two dot plots?

A
The data is more widely spread for Lorenzo’s scores than for Anika’s.
B
There is a gap in Anika’s scores, but not in Lorenzo’s scores.
C
The data is widely spread across both plots.
D
There is a gap in both plots.
5

Which statement compares the shape of the dot plots?

A
There is a gap in both plots.
B
The data is spread widely across both plots.
C
The data is spread widely across Plot B, but not across Plot A.
D
There is a gap in Plot A, but not in Plot B.
6

Which compares the modes of the data?

A
The mode for the students is 4 and the mode for the teachers is 8.
B
The mode for the students is 0 and the mode for the teachers is 1.
C
The mode for the students is 2 and the mode for the teachers is 4.
D
The mode for the students is 2 and the mode for the teachers is 1.
7

Which compares the medians of the data?

A
The median for the students is 4 and the median for the teachers is 3.
B
The median for the students is 2 and the median for the teachers is 3.
C
The median for the students is 2 and the median for the teachers is 8.
D
The median for the students is 4 and the median for the teachers is 8.
9

Which correctly describes the consistency of the speeds of the cars in the two races?

A
The speeds in race A are likely to be near 145 mph and the speeds in race B are likely to be near to 153 mph.
B
The speeds in race A are likely to be near 120 mph and the speeds in race B are likely to be near to 125 mph.
C
The speeds in race A are likely to be near 153 mph and the speeds in race B are likely to be near to 145 mph.
D
The speeds in race A are likely to be near 170 mph and the speeds in race B are likely to be near to 165 mph.
10

Biologists are studying tropical plants to determine how far north each type of plant can survive. What is the population?

A
the tropical plants that were moved farther north
B
biologists participating in the research
C
tropical plants
D
biologists
13

A nutritionist wants to know how the taste of artificial sweeteners impacts food choices of diabetic patients. From which group would it be best to take a sample?

A
patients who do not eat any artificial sweeteners
B
both type 1 and type 2 diabetic patients
C
patients who eat mostly artificially sweetened foods
D
all patients
14

A random sample of people is chosen to participate in a survey. For the survey results to be considered valid, which must be true of the random sample?

A
The sample must be biased.
B
The sample must represent the target population.
C
The sample must be a group separate from the population.
D
The sample must be the same size as the population.
18

A researcher wants to develop a product for families who have small children. He needs to determine if there is a nationwide interest in a toy that will help children describe their emotions. He asks only a sample of the population to complete his survey. What should be true of the sample so that the results of the survey can be used to predict the results of surveying the population?

A
The size of the sample should be larger than the size of the population.
B
The size of the sample should be the same size as the population.
C
The families included in the sample should represent the families in the population.
D
The families included in the sample cannot be included in the population.
21

When Henry surveyed 45 seventh-grade students at random in the school cafeteria, he found that 3 out of 15 liked reggae music. Using proportional reasoning, about how many of the 180 seventh-grade students in his school like reggae?

A
About 36 seventh-grade students like reggae music.
B
About 108 seventh-grade students like reggae music.
C
About 60 seventh-grade students like reggae music.
D
About 12 seventh-grade students like reggae music.

Did you find these answers helpful?