Show:
MMMR
MAD
Statistical Questions
Mystery Quest
100
Find the mean of the following data set: 13, 28, 18, 34, 23, 17, 21
22
100
What does MAD stand for?
Mean Absolute Deviation.
100

If you ask your teacher what her favorite football team is, is that a statistical question?

No.

100
What is the range of the following data set: 13, 56, 25, 67, 68, 45
55
200
What do you do when you're finding the median and you get two numbers in the middle?
Add them up and divide by two.
200

What does the MAD tell you?

The average distance each data point is from the mean; the spread

200

Andrew wants to know whether people in the middle school typically pack or buy lunch on pizza day. He asks Ms. Henry's first period class. Is this survey random or biased? 

Biased.

200

Is there bias in the following question: "What are the heights of students in the middle school?"

No.

300

What is the median of the data set below?

12, 13, 19, 10, 11, 12, 15, 17

12.5

300
When comparing two MADs, which is the data set that is more consistent (or closer together)?
The smaller MAD (the MAD that is closer to 0) is the one that is more consistent. If the MAD is CLOSER to zero, the data is CLOSER together.
300

Is the following question biased or fair? "My favorite ice cream is cookie dough. What's yours?" 

Biased.

300

When a set of data is more spread out, is the data set more consistent or less consistent?

Less consistent.

400

Find the mean, median, mode, AND range of the following data set: 13, 15, 15, 21, 24, 36, 36, 40

Mean: 25 , Median: 22.5 , Mode: 15 and 36 , Range: 27

400
Find the MAD of the following data set: 17, 18, 22, 23, 26, 38 Round to the nearest tenth if necessary.
MAD = 5.3
400

Is the following survey random or biased? 

Anna wants to find out the most common pet type of people in the 7th grade. She asks 30 random 7th graders. 

Random.

400

Amanda had the following test grades: 96, 89, 94, 93, and 87. If she scored a 67 on her next test, what would happen to the mean of the data set?

The mean would decrease.