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Tec 106: Probability And Statistics Question Paper

Tec 106: Probability And Statistics 

Course:Bachelor Of Science In Mechanical Engineering

Institution: Moi University question papers

Exam Year:2012



MOI UNIVERSITY
SCHOOL OF ENGINEERING
FOR THE COMMON COURSES

TEC 106: PROBABILITY AND STATISTICS CAT I

1.a. Find the mean and the median age from the following frequency distribution table 1
b. Using the same axis, draw the histogsco and the frequency polygon for this data.
c. Calculate the mean deviation, quartile deviation, and the standard deviation.
d. Calculat P(65)+D(8)

Age c.a.f
20-25 _ 21
25-30 _ 40
30-35 _ 90
35-40 _ 130
40-45 _ 146
45-50 _166
50-55 _ 176
55-60 _ 186
60-65 _ 195
65-70 _ 199
(7mks)

2. For a set of 25 measurements the mean and the standard deviation were found to be 56 cm and 2 cm respectively. Later on it was found that a mistake had been made in one of the measurement which was recorded as 64 cm instead of 61 cm. Find the correct value of the mean and the standard deviation. (3mks)

3. Find the geometric and harmonic means of the following distribution.

Class frequency
0-9 _ 5
10-19 _ 8
20-29 _ 3
30-39 _ 4
(5mks)




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