Mean
Jamal scored 70, 80, and 90 on three tests. What is his average score?
80
The wait times (in minutes) are: 5, 10, 15. What is the median wait time?
10
Favorite snack survey: chips, candy, chips, fruit. What is the mode?
Chips
Daily temperatures: 60°, 70°, 80°. What is the range?
20°
A box plot shows test scores. What does the median tell you?
The middle score.
A basketball player scored 10, 12, 8, and 20 points in four games. What is the mean?
12.5
Lunch prices: $3, $5, $7, $9. What is the median price?
$6
Shoe sizes sold: 7, 8, 8, 9, 10. What size should a store restock most?
Size 8
Prices of items: $5, $15, $25. What is the range?
$20
What does a long whisker mean?
Data is spread out.
A student wants an average of 85 on 4 tests. So far they have 80, 90, and 70. What must they score on the last test?
100
Test scores: 55, 60, 65, 70, 100. Which measure best represents a “typical” score?
Median
Why is mode useful for a clothing store?
Shows most popular size/item
Why is range useful in weather reports?
Shows how much temperature changes
If one side of the box is longer, what does that suggest?
Skewed Data
The average age of 5 students is 12. One more student joins the group who is 17. What happens to the mean?
It increases
Why might a teacher use median instead of mean for test scores?
To avoid outliers affecting the result
Colors sold: red, blue, green. Each sold the same amount. What is the mode?
No mode
Two classes have the same mean score, but one has a larger range. What does that mean?
Scores are more spread out
Why are box plots useful for comparing two classes?
Show spread and median quickly
The mean height of 4 plants is 10 inches. One plant dies and is removed. Can you determine the new mean?
No, not enough information
A data set has 9 values. Without calculating, where is the median?
5th value/5th spot
A survey has two equally common answers. What is this called?
Bimodal/ Double Mode/2 modes
A data set has a range of 0. What does this mean?
All values are the same
If two box plots have the same median but different boxes, what is different?
Spread (IQR)