Chapter 3 part 2 Flashcards
1
Q
What are the three measures of central tendency?
A
- the mode
- the median
- the mean
Each of these measures describes a different indication of the typical or central value in the distribution.
2
Q
What are the measures of variance?
A
It is the Average squared difference of the values from the mean
V = S^2 and o^2
3
Q
What is/are the mode(s) in this data set: 25, 44, 45, 45, 56, 79, 83
A
45
- There are two number 45
4
Q
What is/are the mode(s) in this data set: 25, 44, 44, 45, 56, 79, 79, 83
A
44 and 79
Two sets of 44 and 79
5
Q
What is the median in this data set: 25, 44, 45, 56, 79
A
45
6
Q
What is the median in this data set: 25, 44, 45, 56
A
44 + 45 = 89
89 / 2 = 44.5
44.5 is the median
7
Q
What is the mean of this data set: 25, 44, 45, 45, 56, 79
A
49
25 + 44 + 45+ 45+ 56 + 79 = 289/ 6 = 49
8
Q
What is the range of the data set in 25, 44, 45, 45, 56, 79
A
54
Max # 79 - Min # 25
