4/3 ~ 14.2 Notes 🕹️Practice Problems

What is a two-way frequency table used for?

• To summarize bivariate categorical data

• To calculate averages

• To display linear equations

• To solve quadratic equations

Tags

CCSS.8.SP.A.4

What is the total frequency for any row or column in a two-way frequency table called?

• Joint frequency

• Marginal frequency

• Relative frequency

• Cumulative frequency

Tags

CCSS.8.SP.A.4

What is the joint relative frequency?

• The total of all frequencies in the table

• The ratio of the joint frequency and the total number of data points

• The difference between the highest and lowest frequency

• The sum of all marginal frequencies

Tags

CCSS.8.SP.A.4

A survey of high school students asked participants their gender and if they play video games. The data is summarized:

68  participants were males who play video games

 60 participants were males who do not play video games

 145 participants do not play video games

There were 279 participants in the survey

Complete the joint frequency table.

a

b

c

d

e

f

g

h

i

279

128

85

151

145

66

68

60

134

Tags

CCSS.8.SP.A.4

Make sure you have completed the table in your notes before you answer the following questions.

• 85

•  How many students surveyed play video games?

• 66

• Of the students who play video games, how many were female?

• 134

• How many female students do not play video games?

Tags

CCSS.HSN.VM.C.6

The two-way frequency table below shows how many freshmen and sophomores are on the swimming or tennis team.

Complete the table.

a

b

c

d

13

18

9

4

Tags

CCSS.8.SP.A.4

What do the highlighted numbers represent?

• Joint Frequencies

• Marginal Frequencies

• Total Frequencies

• Relative Frequencies

Tags

CCSS.8.SP.A.4

What are the joint frequencies?

• 40, 60, 100

• 12, 18, 30

• 20,20,70,240

• 90, 260, 40, 310

Tags

CCSS.8.SP.A.4

What percentage of the survey takers used a gift card?

• 40%

• 60%

• 30%

• 50%

Did a higher percentage of payment other than gift card go to the store or online?

• Store

• Online

• Catalog

• Equal

Tags

CCSS.6.RP.A.3C