Mean
Mary's test scores were 66, 65, 72, 78, 93, 70, 68, and 64. What was the mean (average) of her test scores?
What is 72?
66+65+72+78+93+70+68+64 = 576
576/8 = 72
The median of the data set:
64, 69, 72, 48, 54, 89, 92
What is 69?
48 54 64 69 72 89 92
A group of customer service surveys were sent out at random. The scores were 90, 50, 70, 80, 70, 60, 20, 30, 80, 90, 70, and 20. Find the mode of the scores.
What is 70?
70 appears 3 times in the data set
The range of the following values:
5, 4, 10, 3, 3, 4, 7, 4, 6, 5, 11, 9, 5, 7
The sum of all data values divided by the total number of values.
What is the mean? (Also known as the "average".)
Tina surveyed her classmates to find out how much they paid per month in rent. The responses were: 625, 750, 800, 650, 725, 850, 625, 650, 625, and 1250. What is the mean of the monthly rent paid by students in Tina's class?
What is $755?
625 + 750 + 800 + 650 + 725 + 850 + 625 + 650 + 625 + 1250 = 7,550
7,550 / 10 = 755
The median of the data set:
6, 0, 8, 7, 2, 9, 5, 6, 7, 7, 8
What is 7?
0 2 5 6 6 7 7 7 8 8 9
The mode of the following values:
12, 11, 14, 10, 8, 13, 11, 9
What is 11?
11 is the only value that appears more than once.
The range of the following values:
8, 5, 8, 5, 7, 6, 7, 7, 5, 7, 5, 5, 6, 6, 9, 8, 9, 7, 9, 9, 6, 8, 6, 6, 7
What is 4?
9 - 5 = 4
The value that separates the higher half of a data set from the lower half.
What is the median?
So far this season, Carole has scored the following points per game: 12, 15, 8, 14, 9, 12, 15, 10, 3, 14, 15, 17. What is Carole's average (mean) points per game?
What is 12?
12 + 15 + 8 + 14 + 9 + 12 + 15 + 10 + 3 + 14 + 15 + 17 = 144
144/12 = 12
The median of the data set:
81, 79, 83, 76, 89, 75, 67, 83, 65, 74, 78
What is 78?
65 67 74 75 76 78 79 81 83 83 89
The median of the data set:
10, 38, 71, 42, 39, 76, 36, 25
What is no mode?
None of the values appear more than any other.
The set that has more widely distributed values:
Set A has a range of 12
Set B has a range of 5
What is Set A?
The range of 12 shows that there is a greater distance between the highest and lowest values.
The measure that indicates how closely grouped the values in a data set are.
What is the range?
The mean of four numbers is 71.5. If three of the numbers are 58, 76, and 88, what is the value of the fourth number?
What is 64?
71.5 x 4 = 286
58 + 75 + 88 = 222
286 - 222 = 64
The median of the data set:
43, 37, 35, 30, 41, 23, 33, 31, 16, 21
What is 32?
16 21 23 30 31 33 35 37 41 43
31 + 33 = 64
64 / 2 = 32
What is the mode of the following scores on the math quizzes?
68, 55, 70, 62, 71, 58, 81, 82, 68, 79, 71, 63
What is 68 and 71?
Both 68 and 71 appear twice in the data set.
The range of temperatures during the month of May:
70o F, 76o F, 76o F, 74o F, 70o F, 70o F, 72o F, 74o F, 78o F, 80o F, 74o F, 74o F, 68o F, 76o F, 78o F, 76o F, 74o F, 78o F, 80o F, 76o F
What is 12?
80 - 68 = 12
The measure that can be determined by using a frequency table.
What is the mode?
The mean weight of five complete computer stations is 167.2 pounds. The weights of four of the computer stations are 158.4 pounds, 162.8 pounds, 165 pounds, and 178.2 pounds respectively. What is the weight of the fifth computer station?
What is 171.6?
167.2 x 5 = 836
158.4 + 162.8 + 165 + 178.2 = 664.4
836 - 664.4 = 171.6
The median of the data set:
10, 38, 71, 42, 39, 76, 36, 25
What is 38.5?
10 25 36 38 39 42 71 76
38 + 39 = 77
77 / 2 = 38.5
The mode of the following values:
12, 3, 15, 15, 13, 19, 16, 13, 16, 16
What is 16?
While 13 and 15 both appear twice in the data set, 16 appears three times.
The highest value in a data set of the range is 16 and the lowest value is 32.
What is 48?
16 + 32 = 48
The direction a low outlier skews the mean of a data set.
What is down?