Question 1

Jared surveyed the students in his class to determine how they scored in a game. He displayed his results in the table shown below.

Which histogram represents the data in the table?

Accepted Answer

https://uploads.quizalize.com/aff96c32-8f4c-4ae0-a2a1-a9bbeebf8645/question/3fde79eedab81e9a102e1ebdb58939df2698363a.png

Answer

https://uploads.quizalize.com/aff96c32-8f4c-4ae0-a2a1-a9bbeebf8645/question/09a565b47f98b3ea0cae49bf438013e8f8fe2c04.png

Answer

https://uploads.quizalize.com/aff96c32-8f4c-4ae0-a2a1-a9bbeebf8645/question/ca047ce4e98d57246e057d947316f09842028373.png

Answer

https://uploads.quizalize.com/aff96c32-8f4c-4ae0-a2a1-a9bbeebf8645/question/fe608e9fb30165f417c51d33e82c68d21663a1b9.png

Question 2

Malika and Adrian prepared containers of potato salad at a deli. Each container was supposed to have a mass of one pound. The manager selected a random sample of containers prepared by each employee to check the mass of each container. The results are shown in the table below.

Which inference is BEST supported by these data?

Accepted Answer

Most of Malika's containers will have a mass closer to one pound than most of
Adrian's containers.

Answer

Most of Adrian's containers will have a mass closer to one pound than most of
Malika's containers.

Answer

Adrian will produce more containers with a mass of exactly one pound than
Malika will.

Answer

Malika will produce more containers with a mass of exactly one pound than
Adrian will.

Question 3

A school principal wants to determine which type of speaker the students prefer to invite to an assembly for the entire student population. Which survey method would produce the BEST representative sample?

Accepted Answer

survey every tenth student entering the school one morning

Answer

survey all of the students on the student council

Answer

survey all of the students who went to the last basketball game

Answer

survey every fifth person who shops at a mall

Question 4

A researcher surveyed five randomly selected employees from each of four different companies about their daily commutes to work. The table shows the commute times for the surveyed employees.

Based on the data, which company most likely has the longest average commute time per employee?

Accepted Answer

Company 1

Answer

Company  4

Answer

Company 3

Answer

Company 2

Question 5

A principal gathered data about the distance, in miles, that his teachers and bus drivers live from the school. The box plots below show these data.
Based on the box plots, which statement is true?

Accepted Answer

The interquartile range of the distances for the bus drivers is 5 miles less than the interquartile range of the distances for the teachers.

Answer

The interquartile range of the distances for the bus drivers is twice the interquartile range of the distances for the teachers.

Answer

The range of the distances for the teachers is 5 miles less than the range of the distances for the bus drivers.

Answer

The range of the distances for the teachers is twice the range of the distances for the bus drivers.

Question 6

The students in a class collected data on the number of minutes per day some kids spend brushing their teeth. Their data is shown in the dot plot below.

Which statement correctly describes these data?

Accepted Answer

The median is 1.5 and the mean is greater than the median.

Answer

The median is 1.5 and the mean is less than the median.

Answer

The median is 0.5 and the mean is greater than the median.

Answer

The median is 0.5 and the mean is less than the median.

Question 7

What is the first step when calculating the mean absolute deviation?

Accepted Answer

Find the mean of the data set

Answer

Find the mean of the absolute value.

Answer

Find the absolute value of the data set.

Answer

Find the difference between the data points.

Question 8

Find the mean absolute deviation of 10, 9, 3, 8, 10.

Accepted Answer

2

Answer

5

Answer

3

Answer

1

Question 9

Find the mean absolute deviation of 58, 38, 54, 48, 26, 36.

Accepted Answer

10

Answer

20

Answer

43

Answer

12

Question 10

A school wants to find out the average number of books read by students in a month. They take a random sample of 30 students and find an average of 5 books read per student. If they take another random sample of 30 students, which statement is most likely true?

Accepted Answer

The average number of books read will be close to 5 but may vary slightly.

Answer

The average number of books read will be zero.

Answer

The average number of books read will be exactly 5.

Answer

The average number of books read will be completely different.

Question 11

A botanist is studying the height of a particular species of plant. A random sample of 20 plants shows an average height of 15 cm. If the botanist takes additional random samples of 20 plants each, what is the most likely outcome?

Accepted Answer

The average height will be close to 15 cm with some small variations.

Answer

The average height will be 0 cm.

Answer

The average height will always be exactly 15 cm.

Answer

The average height will be completely different in each sample.

Question 12

Why is it important to use a random sample rather than a convenience sample?

Accepted Answer

A random sample is more likely to be representative of the population

Answer

A convenience sample is always less expensive

Answer

A random sample includes only volunteers

Answer

A convenience sample requires more participants

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