Basic Statistics 6th and 7th grade

The dot plots show exam scores for

25 students. Which exam has an outlier?

• Semester 1

• Semester 2

• Both

• Neither

What are the medians for the Semester

1 exam and the Semester 2 exam?

• 75 and 79.8

• 85 and 80

• 75 and 80

• 95 and 100

Tags

CCSS.HSS.ID.A.3

A sample is being chosen for a survey to find out how people feel about adding more stop signs near a school. Which group would be least biased?

• randomly chosen voters

• randomly chosen drivers

• randomly chosen students

• randomly chosen teachers

Tags

CCSS.7.SP.A.1

CCSS.HSS.IC.A.1

• Daytime people

• Evening people

• They have the same number.

• You cannot tell from the box plots.

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

A random sample of 60 was taken from a shipment of 12,500 light bulbs. There were 2 defective bulbs in the sample. How many defective bulbs would you expect in the entire shipment? Round to nearest whole number if needed. (12,500 divided by 60.....answer multiplied by 2)

• 250

• 417

• 2500

• 4,167

Tags

CCSS.7.SP.A.2

Tia wants to find out students’ favorite after-school activity. She asks a sample of students, “Do you like doing sports after school?” Rewrite the question so it is not biased.

• What is your favorite class?

• Do you like sports?

• What is your favorite after-school activity?

• Do you stay after school for activities?

Which value is not part of the five key values that represent a box plot?

• the lower quartile

• the least value

• the median

• the range

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

What are the two medians?

• 10 and 10

• 30 and 35

• 40 and 50

• 20 and 70

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

The circled numbers represent the agent’s random sample. Use the mean of the random sample to estimate the total number of people in the entire 15-block neighborhood. Find the mean and then multiply it by the 15-block to see how many people live on the block.

• The mean of the random sample is 5, so the total number of people in the neighborhood is estimated to be 15 x 5, which is 75.

• The mean of the random sample is 15, so the total number of people in the neighborhood is estimated to be 15 x 15, which is 225.

• The mean of the random sample is 10, so the total number of people in the neighborhood is estimated to be 15 x 10, which is 150.

• The mean of the random sample is 8, so the total number of people in the neighborhood is estimated to be 15 x 8, which is 120.

Tags

CCSS.7.SP.A.2

Find the range and median.

• range: 1; median: 3

• range: 3; median: 12

• range: 12; median: 3

• range: 2; median: 2

Tags

CCSS.6.SP.B.5C