Making Inferences

If Mr. Estes looked at the means (averages) for the last SAFE Quiz for his classes, and the averages were 72%, 71%, and 74%, what inference can you make based on those averages?

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If Mr. Estes looked at the means (averages) for the last SAFE Quiz for his classes, and the averages were 81%, 82%, and 99%, what inference can you make based on those averages?

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Marvin's grades currently in math are 100, 97, 98, 74, and 85. Gavin's grades currently in math are 98, 100, 88, 91, and 65. Find the range of each student's scores and make an inference about their ranges.

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Q1. How many red shirts do you have?

• A) 5 red shirts

• B) 17 red shirts

• C) 40 red shirts

• D) 83 red shirts

What inference can you draw from this survey?

• I can infer that most students in this school like pizza.

• I can infer that very few students like hamburgers.

• I can infer that their favorite is corn dogs.

• I can infer that most students in this school like hamburgers.

Litzy collects data from a random sample of 7th graders. Out of 40 respondents, 7 attend afterschool programs. Of the 200 7th graders attending Litzy's school, how many would be expected to attend afterschool programs?

• 14 7th graders

• 28 7th graders

• 35 7th graders

• 42 7th graders

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

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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

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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

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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

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tables

teks 7.12B

inferences