Notesale: Turn your study into money

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EXERCISES IN STATISTICS- BRYAN M
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Nozaleda
MST – CHEM

EXERCISES IN STATISTICS- BRYAN M
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Identify the variables in the following situations
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a
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How do three counseling techniques—rational-emotive, gestalt, and no-counseling—
differ in their effectiveness in decreasing test anxiety in high school juniors?
c
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Identify the independent (IV) and dependent (DV) variable, and determine whether each
variable is qualitative or quantitative
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a
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Are students aged 55 and older more likely to drop out of college than students of
ages between 30 and 40?
c
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The main purpose of this study is to compare the effectiveness of two reading
methods, sight and phonics, in increasing verbal comprehension
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The study investigated whether the ability to discriminate among parts of speech
increased with chronological age and educational level
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NOZALEDA

3
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Simplify the variable name if possible
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a
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the number of children in your family
c
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whether one has a pet
e
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Age on First
Date

Measurement Scale
Ratio

Discrete or Continuous
*since not specified as to
“months” or “years”- can be
CONTINUOUS; however,
a wise researches would ask
their ages in years so it
could be DISCRETE too
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Number of
Children
C
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If one has a pet
E
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Have a
hard copy of your output
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NOZALEDA

11
12
13
14
15
16
17
18
19
20

14
15
14
15
13
12
14
15
16
15

2
2
2
2
2
2
2
2
2
2

1
1
1
1
1
2
2
2
2
2

86
87
85
84
83
88
87
86
85
84

22
24
23
25
22
23
24
21
20
21

Activity 2: Using the Excel file of the data above, use an appropriate data figure presentation for
1
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3
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age
sex
ability level
GPA

ANSWERS:


Activity 1
ENCODED DATA FROM EXCEL:

Table 1
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NOZALEDA



Activity 2

A
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Sex

EXERCISES IN STATISTICS- BRYAN M
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Ability Level

Figure 3 Ablility Levels of Twenty
Randomly Selected Respondents
12
10
8
High

6

Low

4
2
0
Ablility Level

D
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NOZALEDA

Exercise 3
SUMMATION NOTATION
1
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 Yl = Y2 +Y3 +Y4 +Y5 +Y6
l 2

3

b
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 5 X i  Yi  Z i  = 5[(X1 +X2 +X3 +X4 +X5 )+ (Y1 +Y2 +Y3 +Y4 +Y5 )+ (Z1 +Z2 +Z3 +Z4+Z5)]
i

2
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(X1 + Y1 2 ) + (X2 + Y2 2 ) +
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4Y1 + 4Y2 +
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(X5 + Y5 )2 + (X6 + Y6 )2 + (X7 + Y7 )2 + ∙∙∙ + (X10 + Y10 )2 =

 X
10

i

 Yi



2

i 5

3
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Y

l

=4+5+6+8+11

l 2

=34
6

b
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XY

i i

Note: for item c, use the six pairs of data

i

= (1 x 2) + (3 x 4) +(4 x 5) + (7 x 6) + (9 x 8) + (10 x 11)= 258

6
10
11

EXERCISES IN STATISTICS- BRYAN M

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