Making Statistical Inferences

• About 40% of the marbles in the bag are red.
• The bag probably contains about 45 yellow marbles.
• There are about twice as many blue marbles than green marbles. 
• There are about three times as many green marbles as there are red marbles. 

The circle graph shows the results of a random survey of students who plan to attend the school dance. Based on the information in the graph, which inference about the general population of students is valid?

• More 6th graders than 7th and 8th graders plan to attend the dance

• 8th graders do not like to dance

• It is certain that a 6th grader will attend the dance

• It is more likely that a 7th grader will attend the dance than a 8th grader attending

Tags

inferences

pie chart

circle graph

teks 7.12B

A book store took a random survey of customers about their favorite book genre. The table shows the number of customers who selected each genre. Based on the information in the table, which inference about the favorite genre of all the customers appears to be valid?

• They are certain to select Romance or Young Adult

• They are less likely to select Sci-Fi than Horror, Non-Fiction or History

• They are more likely to select Romance than Sci-Fi, Horror, and History

• They are certain to select any genre other than History

Tags

inferences

tables

teks 7.12B

Petunia conducted a random survey of students to determine the favorite genre of music of 50 students. The results are shown in the bar graph. Based on the information in the graph, which inference about the students is valid?

• Girls like country music more than boys like rap music

• More girls than boys like rock music

• Boys like country music more than rock music

• Boys like rock music more than girls like rap music

Tags

inferences

bar graph

teks 7.12C

A survey was taken at a school of 30 students favorite food. The circle graph shows the number of students who selected each. Based on the information in the graph, which inference about the favorite food of all students appears to be valid?

• It is certain that a student will choose Pizza

• It is less likely that a student will choose Pasta or Hamburgers over Pizza

• It is certain that a student will NOT choose Pasta

• It is more likely that a student will choose Pizza over Hamburgers, Pasta, or Other combined

Tags

teks 7.12B

inferences

circle graph

pie chart

A random survey was conducted at an office about the workers favorite office supply. The results are shown in the table below. Based on the information in the table, which inference about favorite office supply of all the workers appears to be valid?

• It is certain that an office worker will NOT choose Tape as their favorite office supply

• It is certain that an office worker will choose Paper as their favorite office supply

• It is more likely that an office worker will choose Pens, Staplers, or Paper Clips over Paper

• More people like Staplers or Paper Clips over Pens/Pencils

Tags

tables

teks 7.12B

inferences

A random survey was conducted with 6th and 7th graders of their favorite sport. The results are shown in the bar graph. Based on the information in the graph, which inference about all 6th and 7th graders is valid?

• 6th graders like Basketball more than Football

• More 6th graders than 7th graders like Soccer

• 6th graders like Soccer more than 7th graders like Baseball

• 7th graders like Football more than they like Basketball

Tags

inferences

bar graph

teks 7.12C

The results of a random survey about a person's favorite pet is shown in the table. Based on the information in the table, which inference about the favorite pet of the general population appears to be valid?

• It is certain that a person will choose Dog as their favorite pet

• It is less likely a person will choose Dog than Cat or Fish

• It is more likely a person will choose Fish or Bird than Cat

• Dogs are liked more than all other animals combined

Tags

inferences

tables

teks 7.12B

A random survey of people at the mall was taken to determine favorite color. The results are shown in the circle graph. Based on the information in the graph, which inference about the general population is valid?

• It is more likely someone will choose Blue than Red or Pink

• It is certain that someone will NOT choose Black

• It is less likely someone will choose Red than Green, Pink, or Purple

• More people like Blue than all other colors combined

Tags

inferences

circle graph

pie chart

teks 7.12B

The bar graph shows the results of a random survey of people about their favorite fruit. Based on the information in the graph, which inference about the general population is valid?

• More men than women like apples

• More men like bananas than women like strawberries

• More women like strawberries than men who like apples

• It is certain that a woman will choose strawberries

Tags

inferences

bar graph

teks 7.12C