1. Find the mode of the following set of numbers: 1, 2, 2, 3, 4, 4, 5
2
3
4
2 & 4

2. Find the median of the following set of numbers: 96, 68, 78, 82, 87, 74, 80, 70, 86, and 84.
87
81
82
80

3. Find the mean of the following set of numbers: 28, 24, 22, 24, 26, 26, 22, 24, 22, 28, 30, and 24.
25
22
24
24.5

4. The median of an ordered set of data is the value that represents:
The middle or the approximate middle value of the data set.
The most frequent observed value.
The mean of the squared deviations of the value from the mean.
The arithmetic average of the data values.

5.What type of distribution is described by the following information?
mean = 5.5, median = 5.3, mode = 4.4
Negatively skewed
Symmetrical
Bimodal
Positively skewed

6. The interquartile range is the distance from:
Q₂-Q₁
Q₄-Q₃
Q₃-Q₁
None of the above

Use the following frequency distribution to answer questions 7-8:

Scores	Midpoint	Frequency	(xi)(fi)
96-100	98	3	294
91-95	93	4	372
86-90	88	8	704
81-85	83	7	581
76-80	78	6	468
71-75	73	5	365
66-70	68	3	204
61-65	63	2	126
56-60	58	2	116

7. What is the sample size, n?
50
100
9
None of the above

8. What is the mean?
80.75
80
78
81.5

9. A professor has organized the grades from a large lecture course. He notices that there are a large number of grades below 50, a moderate number from 51-75, and very few grades falling into the 76-100 range. Select the shape of the distribution that most closely represents the above description.

10. The median of the scores 4, 3, 5, 2, 1, is __________.
2
3
4
5

Score = 
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