Statistics test Review

James surveyed a random sample of 20 students in her school about whether they buy lunch or not.

-14 of the sample students said they bought lunch

-A total of 840 students eat in the cafeteria every day

Based on the results, how many of the 840 students who eat lunch will buy lunch?

Students recorded the amount of minutes they spend watching TV. Using the box plot shown above, what is the first quartile?

• 30

• 24

• 60

• 78

Mr. Fisk, Ms. Martinez, and Mrs. Smeltzer, gathered every 6th grade math score on the test they took, which is shown in the box plot above. What is the median score the 6th grade students received?

• 64

• 70

• 84

• 72

The box plot shown above shows the length of time (minutes) children spent in the swimming pool. What is maximum amount of time the children spent in the swimming pool?

• 95

• 70

• 77.5

• 50

Students were asked how many minutes they spent reading last night for ELA. Using the box plot above, what is the third quartile?

• 47.5

• 40

• 75

• 50

How do I find the Interquartile Range (IQR) on a box plot?

• Add the min. and max.

• Add Q1 and Q3

• Subtract Q1 and Q3

• Subtract the min. and max.

Based on the box plot above, how do I find the IQR?

• 45 - 33

• 45 + 33

• 23 + 58

• 58 - 23

Mr. Fisk, Ms. Martinez, and Mrs. Smeltzer, gathered every 6th grade math score on the test they took, which is shown in the box plot above. What is the third quartile score the 6th grade students received?

• 64

• 70

• 84

• 72

What does median mean?

• In the middle

• When you add it all up and divide by how many numbers you just added

• Smallest number minus the biggest number

• most repeated number

What is the inner quartile range of the weekly car sales?

• 10

• 6

• 4

• 3