Central Tendency
94
Josie has grades of 92, 88, and 86 on her last three math tests. She wants her test average to be 90 after her fourth test. What must she make on the fourth test for this to happen?
Mode
Number or Numbers that occur most often (if the answer appears twice, choose the one with the upper case letter)
Median
Sasha scores the following point totals in 7 games this basketball season: 12, 18, 20, 8, 15, 18, and 14. If she drops her lowest score, which measure of central tendency would increase more, the mean or median?
Mean
Sum of the data divided by the number of items in the data set.
mode
The average wait times for 10 different rides at an amusement park are 65, 21, 17, 52, 25, 17, 11, 22, 60, and 44 minutes. Which measure of central tendency (mean, median, mode) would the amusement park advertise to show that the wait times for its rides are short?
Median
The middle number of the data ordered from least to greatest, or the mean of the middle two numbers.
Range
The smallest number subtracted from the largest number in the data set.
18
What is the 3rd quartile of 13, 9, 18, 15, 14, 21, 7, 10, 11, 20, 5, 18, 37, 16, 17
10
What is the first quartile of 13, 9, 18, 15, 14, 21, 7, 10, 11, 20, 5, 18, 37, 16, 17
30
What is the interquartile range of 100, 60, 60, 50, 100, 90, 80,70, 80, 50
8
What is the interquartile range of 13, 9, 18, 15, 14, 21, 7, 10, 11, 20, 5, 18, 37, 16, 17
10.5
What is the mean of 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11
70
What is the mean of 100, 80, 70, 60, 40
7
What is the mean of the following numbers (rounded to the nearest tenth, if needed)? 15, 5, 3, 3, 9
6.3
What is the mean of the following numbers (rounded to the nearest tenth, if needed)? 3, 5, 6, 7, 9, 6, 8
3.7
What is the mean of the following numbers (rounded to the nearest tenth, if needed)? 8, 1, 2, 6, 1, 4
5.5
What is the median of 1, 2, 10, 9, 5, 3, 4, 8, 7, 6
15
What is the median of 13, 9, 18, 15, 14, 21, 7, 10, 11, 20, 5, 18, 37, 16, 17
3
What is the median of the following data? 8, 1, 2, 6, 1, 4
5
What is the median of the following numbers? 15, 5, 3, 3, 9
6
What is the median of the following numbers? 3, 5, 6, 7, 9, 6, 8
12
What is the mode of 12, 10, 12, 9,8,10,12,6,8,9
None
What is the mode of the following numbers? 115, 128, 164, 116, 151, 114, 111, 110
5
What is the mode of the following numbers? 15, 5, 3, 3, 9, 5,5
8
What is the mode of the following numbers? 3, 5, 8, 7, 9, 6, 8, 8, 8
1
What is the mode of the following numbers? 8, 1, 2, 6, 1, 4
32
What is the range of 13, 9, 18, 15, 14, 21, 7, 10, 11, 20, 5, 18, 37, 16, 17
93
What is the range of 55, 47, 23, 45, 33, 22, 78, 100, 32, 67, 8, 45, 100, 101
16
What is the range of the following numbers? 14, 15, 10, 18, 11, 21, 19, 24, 22, 26
10.5
What is the range of the following numbers? 19, 17, 24.5, 27.5, 20.3
9.5
What is the range of the following numbers? 31.4, 32.4, 29.8, 27.6, 37.1
75th percentile
the 3rd quartile is the same as . . .
25th percentile
the first quartile is the same as . . .
50th percentile
the median is the same as . . .
