Casio fx-350MS Booklet

CHAPTER 6 Elementary Statistics
16
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2
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5
4
5
0
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2
+
5
9
5
5
MODE
2
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=
¡
¡
2
SHIFT
;
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1
0
M
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5
7
SHIFT
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1
M
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5
The weight distribution of 100 students is given in the table. Calculate an
estimate of the mean and the standard deviation for this distribution.
Weight (kg)
Frequency
50-54 10
55-59 11
60-64 22
65-69 29
70-74 12
75-79 16
OPERATION
1. First, determine the mid-point for all class intervals.
Then,
2. Use similar operations as in step 1 to find the rest of the mid-points, we will get the result
as below.
3. Now enter SD (standard deviation) mode. Press
4. Input all data obtained in step 2.
Weight (kg)
Mid-point Frequency
50-54 52 10
55-59 57 11
60-64 62 22
65-69 67 29
70-74 72 12
75-79 77 16
Exam
p
le 1
50+54
104
Ans¡2
52
55+59
114
Ans¡2
57
SD D
0
n=
SD D
10
n=
SD D
21

Casio fx-350MS Specifications

General

Type	Scientific
Form factor	Pocket
Power source	Battery

Weight and Dimensions

Weight	100 g
Dimensions (WxDxH)	12.2 x 85 x 155 mm