Find the mean of the following data set:
13, 28, 18, 34, 23, 17, 21
22
100
What is an outlier?
A number that is way larger or way smaller than the rest of the numbers in a data set.
100
What does MAD stand for?
Mean Absolute Deviation.
100
What two things must a question have to be considered statistical?
A specific population & variability in the answers.
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
When there is an outlier, which measure of central tendency best describes the data?
The median.
200
What does the MAD tell you?
The average distance each data point is from the mean.
200
If you ask your teacher what her favorite football team is, is that a statistical question?
No.
200
Is there variability in the following question: "What are the favorite desserts of students in our class?"
Yes.
300
What are the three measures of central tendency?
Mean, Median, and Mode.
300
Which one is the outlier?
22, 28, 62, 17, 24
62.
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 statistical or non-statistical? "What's the average amount of fidget spinners sold each week in Edison, New Jersey?"
Statistical.
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
Which measure of central tendency describes the following data set and why:
19, 23, 32, 86, 25, 36, 28
The median because there is an outlier.
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 question statistical or nonstatistical? "How many ice cream bars did you eat last summer?" Why or why not?
Nonstatistical because there can only be one answer.
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.
500
Tina got the following scores on her last 4 math quizzes: 96, 87, 93, and 78. What must she get on her 5th quiz to get an average of score of 90 in the class?
96
500
When an outlier is added to a data set, which of these measurements will usually change the most? The mean, median, mode, or range?
The range because if its an outlier it's either way bigger or way smaller than the rest which increases the distance between the lowest value and the highest value.
500
Find the MAD of the following data set:
24, 36, 47, 52, 44, 29, 48
Round to the nearest tenth if necessary
MAD = 8.9
500
Is the following question statistical or nonstatistical? "How much do the players on the New York Giants bench press in the gym?" Explain why or why not.
Statistical because it asks a specific population (NYG) and yields many different answers.
500
What is the second step when finding mean absolute deviation?
Find the distance of each data point from the mean