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Worksheet 1 - LLL

LLL
Course

Abnormal Psychology (PSYC 2002)

21 Documents
Students shared 21 documents in this course
Academic year: 2022/2023
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Omeala Young
The University of the West Indies Mona
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Department of Psychology, Sociology and Social Work

SY16C - Introductory Statistics for the Behavioural

Sciences

Worksheet 1

1. What is an average?

2. Define the following:

(a) mean

(b)median

(c) mode

3. How are the levels of measurements relevant to the measures of

central tendency?

4. Each student in a University sat the SY16C examination. The

results are shown in the grouped frequency distribution

below.

Marks

Frequen

cy

1-20 8

21-30 30

31-40 90

41-50 103

51-60 79

61-70 64

71-80 21

81-90 5

Estimate the

a) mean

b) mode

c) standard deviation

d) variance

of these marks for the population.

5. Using the following data prove that sum of the deviations about the

mean is zero.

29 25 26 28 25

19 23 26 17 20

28 29 26 21 24

6 can be quantitatively assessed by using

3(mean – median)

1

. standard deviation

Calculate this numerical measure of skewness for the following

distribution which shows ages of patients in a hospital.

58 39 30 48 27 16 56 56 65 63

Comment on the skewness of this distribution.

7 the following:

a) 7 (8 + 2)

b) 3 + 20 (10 - 8)

c) 3 * 4 – 5 * 4

2 (4 – 2) (9 - 8) (NB. * = multiplication)

2

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Worksheet 1 - LLL

Course: Abnormal Psychology (PSYC 2002)

21 Documents
Students shared 21 documents in this course

University: The University of the West Indies Mona

Was this document helpful?
Department of Psychology, Sociology and Social Work
SY16C - Introductory Statistics for the Behavioural
Sciences
Worksheet 1
1. What is an average?
2. Define the following:
(a) mean
(b)median
(c) mode
3. How are the levels of measurements relevant to the measures of
central tendency?
4. Each student in a University sat the SY16C examination. The
results are shown in the grouped frequency distribution
below.
Marks
Frequen
cy
1-20 8
21-30 30
31-40 90
41-50 103
51-60 79
61-70 64
71-80 21
81-90 5
Estimate the
a) mean
b) mode
c) standard deviation
d) variance
of these marks for the population.
5. Using the following data prove that sum of the deviations about the
mean is zero.
29 25 26 28 25
19 23 26 17 20
28 29 26 21 24
6.Skewness can be quantitatively assessed by using
3(mean – median)
1

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