Unit 6 Test Corrections

A student will spin two spinners in an experiment. The tree diagram shows all possible outcomes of the experiment.

Which sample space is described by this tree diagram?

• {(1, R), (1, T), (1, Z), (2, R), (2, T), (2, Z), (3, R), (3, T), (3, Z)}

• {(1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3), (3, 1), (3, 2), (3, 3), (1, R), (1, T), (1, Z), (2, R), (2, T), (2, Z), (3, R), (3, T), (3, Z)}

• {(1,2,3), (R,T,Z)}

• {(1,R,T,Z), (2,R,T,Z), (3,R,T,Z)}

Tags

CCSS.7.SP.C.8B

The spinner shown has eight congruent sections.

The spinner is spun 120 times. What is a reasonable prediction for the number of times the spinner will land on an even number?

• 75

• 45

• 15

• 40

Tags

CCSS.7.SP.C.6

A farmer plants crops on 48 acres of land. The circle graph shows the percentages of land used for some of the different types of

crops. Based on the circle graph, how many acres of land are used for corn?

Fazio is selecting a jersey. His choices are shown below.

Fazio chooses a jersey at random and then replaces it. He then selects a second jersey at random. What is the probability that Fazio selects a striped

jersey both times?

• 1/100

• 1/16

• 1/25

• 1/81

A survey of visitors at a national park was conducted to determine the preferred activity of each visitor to the park. Each visitor chose one activity. The

survey results are shown in the table.

Based on this information, which prediction about the preferred activity for the next 200 visitors to the park is the most reasonable?

• The number of visitors who prefer water sports will be 5 more than the number of visitors who prefer biking trails.

• The number of visitors who prefer hiking trails will be 8 more than the number of visitors who prefer water sports.

• The number of visitors who prefer camping will be 15 times the number of visitors who prefer hiking trails.

• The number of visitors who prefer camping will be 2 times the number of visitors who prefer water sports.

Tags

CCSS.7.RP.A.2C

Parker conducted a random survey at the mall to determine the number of songs in each genre that were downloaded by 40 students. The results are shown in the bar graph.

Based on the information in the graph, which inference about the general population of students is valid?

• Girls like country music more than all other genres combined.

• 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

CCSS.7.SP.A.2

Choose the correct answers to fill in the blanks.

The data displayed below shows the average test grade for boys and girls at Summit Middle School. Based on the data displayed the spread of data for boys is _____ and the spread of data for girls is _____ therefore, the spread of the boys data is ______________________ than the girls.

• 75

• 65

• 60

• less than

• greater than

Tags

CCSS.6.SP.A.2

The graph below shows the number of items sold at an electronics store one weekend.

Which statement is best supported by the information in the graph?

• The number of video games sold was 1/3 of the number of computers sold.

• The number of music systems sold was 36 more than the number of video games sold.

• The number of televisions sold was 12 more than the number of DVDs sold.

• The number of televisions sold was 1/4 of the total number of items sold.

A classroom is arranged with 8 seats in the front row, 10 seats in the middle row, and 12 seats in the back row. The teacher randomly assigns seats to students as they enter the classroom. What is the probability that the first student who enters the classroom will be assigned a seat in the front row?

• 2/5

• 2/3

• 4/11

• 4/15

Tags

CCSS.HSS.CP.B.9

A college conducted a survey of randomly selected freshmen about their choice of major. The table shows the results of the survey.

Which inference about all freshmen at this college is best supported by this information?

• The number of freshmen who chose English as their major is less than the number of freshmen who are Undecided on their major.

• The number of freshmen who chose Education as their major is greater than the number of freshmen who chose Science or Other as their major.

• The number of freshmen who chose Business or Education as their major is less than the number of freshmen who chose Science or Engineering as

  their major.

• The number of freshmen who chose Business as their major is greater than the number of freshmen who chose English as their major.

Tags

CCSS.7.SP.A.2