Unit 8.1-8.5 Quiz- Maesch

Which question is NOT a statistical question?

• How much rainfall was there each month last year?

• What is the height of each tomato plant in the garden?

• How many hours a week do students spend playing video games?

• What did Micah eat for lunch yesterday?

Answer explanation

To recognize and write statistical questions, determine whether the questions has only one answer of several different answers. Statistical questions have a variety of different answers.

Tags

CCSS.6.SP.A.1

The table shows Annabeth's scores on her math assignments. Find the mean.

(a)  

Answer explanation

Mean - Find the sum of the numbers and divide by the # of values in the list. $\frac{7+10+16+9+12+21+14+8+13+15}{10}=12.5$

Tags

CCSS.6.SP.B.5C

Julian surveyed his friends about how many pets they have. Use the data in the table to find the median.

(a)  

Answer explanation

Mode - List the numbers in order from least to greatest. The median is the middle value. If there are 2 numbers in the middle, then add and divide by 2.

7, 8, 9, 10, 12, 13, 14, 15, 16, 21 $\left(12+13\right)\div2=12.5$

Tags

CCSS.6.SP.B.5C

Julian surveyed his friends about how many pets they have. Use the data in the table to find the mode.

(a)  

Answer explanation

Mode - Which number occurs most often in the list. There can be no mode, 1 mode, or more than 1 mode.

7, 8, 9, 10, 12, 13, 14, 16, 21

NO mode

Julian surveyed his friends about how many pets they have. Use the data in the table to find the range.

(a)  

Answer explanation

Range - Largest value minus smallest value in the list.

7, 8, 9, 10, 12, 13, 14, 15, 16, 21

21 - 7 = 14

Tags

CCSS.4.MD.B.4

The following box plot shows the distribution of age among the passengers in an airplane.

What is the maximum age of the youngest 25% of the passengers?

• 15

• 45

• 30

• 75

Answer explanation

A box plot shows a distribution of data values on a number line. A box plot visually represents data divided into four equal parts, called quartiles.

10, 20, 21, 30, 32, 35, 40

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

The box plot below describes a data set. Which of the following has a value of 18?

• First quartile

• Median

• Range

• Third quartile

Answer explanation

A box plot shows a distribution of data values on a number line. A box plot visually represents data divided into four equal parts, called quartiles.

10, 20, 21, 30, 32, 35, 40

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

Kianna and her friend collected pledges for a local walk-a-thon. They recorded the number of pledges they each received in a frequency table.

How many walkers received more than 39 pledges?

• 13

• 11

• 7

• 12

Answer explanation

Add up all of the frequencies that meet the criteria.

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

The histogram shows the results of a survey asking students how many windows are in their homes.

How many students have less than 10 windows in their homes?

(a)  

Answer explanation

Add up the frequencies of the bars that meet the criteria.

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

Which value has an absolute deviation of 5 from the mean of this data set? The mean of the data set is 23.

26, 12, 35, 28, 14

• 35

• 28

• 14

• 26

Answer explanation

Deviation is the amount by which a single measurement differs from a fixed value such as the mean. Which value differs by 5 from the mean?

Tags

CCSS.6.SP.B.5C