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28 questions
A student wants to know which type of pizza the students at his high school prefer. Which option would give an unbiased, representative sample:
Asking all the students in the hot lunch line.
Asking 10 random students from each homeroom.
Asking every other student who gets off a school bus.
Asking all the 10th graders.
14 7th graders
28 7th graders
35 7th graders
42 7th graders
River Bluff High School has a student population of 3020. In a sample of 250 students, 170 of them were female athletes. Approximately how many students in the entire population should be female athletes?
170
205
2,054
2,770
Several students were surveyed about their favorite drinks. 22 said orange soda, 34 Pepsi, 40 coke, and 29 grape soda. Predict how many students will like coke if 500 students are surveyed?
12.5
40
160
167
What is the first quartile?
4
5
6
7
What is the third quartile?
4
5
6
7
What is the interquartile range?
3
6
4
5
What is the third quartile?
7
6
8
3
The table shows the points earned by contestants in a competition. Find the range and the interquartile range of the points.
Range: 15; IQR: 13
Range: 15; IQR: 12
Range: 15; IQR: 11
Range: 15; IQR: 10
Calculate the interquartile range of the following data: 17, 18, 18, 19, 20, 21, 21, 23, 25
3
8
4
5
What is the interquartile range (IQR)?
20
25
30
50
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