# STT102 TMA1-4 Questions

#### STT102 Tma Questions

The following data were collected on ten infants. Fin the standard error, $S_{yx}$. Where$S_{yx}^2 = \sum_{i=1}^{10} {y_{i} – \hat y_{i}}^2\}$and $y_{i}$are the observed values , \hat y_{i} are the predicted values
$\S_{yx} = 5.75$
$\S_{yx} = 4,75$
$\S_{yx} = 2.75$
$\S_{yx} = 3.75$

Given the general form of linear equation $y = b + b_{1}X$. If$b_{1} > 0$, then the line slopes
downward
upward
flat
parallel

In the age distribution of Receipients of Nursing scholarship of 25, 21, 22, 20, 19, 30, 27, 28, 32 and 18. Determine the variance. (Hint: use$S^2 = \sum X – \bar {X}^2$
215.6
251.6
225.6
252.6

Consider Attitude Scores for five newly admitted Nursing students towards alcoholic patients below: Attitude: 5, 4, 3, 2, 1 . The percentage due to attitude 3 is ________
0.5
0.4
0.2
0.3

The data below represent systolic blood pressure readings (mm Hg), using Spearman’s Rank Order Correlation method, determine correlation coefficient $r_{s}$ of the two readings.
$r_{s} = 0.23$
$r_{s} = -0.32$
$r_{s} = 0.32$
$r_{s} = -0.23$

One Precaution in correlation is that _________
Correlation is a causation
Correlation is not a causation
Correlation does not apply to a range of values observed for two variables
Correlation means that one variable is not independent of the other

Determine Correlation Coefficient ‘r’ using the above values or from your direct-calculation
0.9
0.91
0.95
0.92

Find the value of S_{w1w2} in question one above
4135
4235
4335
4325

From the above, evaluate \S_{w2w2}.
2440
2410
2420
2430

This is for Questions 1 to 4. Two weekly scores of a students are as below <> . Find \S_{w1w1}
6250.25
6150.5
6312.5
6300.5

Given that X = 20, 30, 40, 50, 60. Find $\bar X$.
40,
30,
35
45

Consider this distribution 12, 20, 13, 15, 17, 15, 18. Find $\bar X_{m}$, where $\bar X_{m}$ is as earlier defined.
9
11
13
15

Let $\bar X_{m}$ be the Median Score, Determine $\bar X_{m}$ in 15, 13, 15, 12, 12, 16, 15, 14, 13
10
12
14
16

Suppose \X_{m} is the Mode. Find \X_{m} in 15, 13, 15, 12, 12, 16, 15, 14, 13.
11
13
15
17

Take X = 29, 27, 28, 30, 35. Evaluate \bar {X}
29.8
39.8
49.8
59.8

Suppose X = 10, 12, 8, 7, 5. Find the value of ($\sum{i=1}^{5} X_{i}-2)^2$
204
214
224
234

If X=10, 12, 8, 7, 5. Evaluate {1} \{3} $\sum{i=1}^{5} X_{i}$
192
196
200
204

Determine [ \sum{i=1}^{5} X_{i}]^2 if X = 10, 12, 8, 7, 5
1265
1764
1785
1951

Let Y = 2, 5, 6, 7. Find \sum{j=1}^{4} Y_{j}
114
120
125
141

If X=10, 12, 8, 7, 5 Determine \sum{i=1}^{5} X_{i}
40
41
42
43

Given that X = 20, 30, 40, 50, 60. Find $\bar X$.
40,
30,
35
45

Consider this distribution 12, 20, 13, 15, 17, 15, 18. Find $\bar X_{m}$, where $\bar X_{m}$ is as earlier defined.
9
11
13
15

Let $\bar X_{m}$ be the Median Score, Determine $\bar X_{m}$ in 15, 13, 15, 12, 12, 16, 15, 14, 13
10
12
14
16

Suppose \X_{m} is the Mode. Find \X_{m} in 15, 13, 15, 12, 12, 16, 15, 14, 13.
11
13
15
17

Take X = 29, 27, 28, 30, 35. Evaluate \bar {X}
29.8
39.8
49.8
59.8

Suppose X = 10, 12, 8, 7, 5. Find the value of ($\sum{i=1}^{5} X_{i}-2)^2$
204
214
224
234

If X=10, 12, 8, 7, 5. Evaluate {1} \{3} $\sum{i=1}^{5} X_{i}$
192
196
200
204

Determine [ \sum{i=1}^{5} X_{i}]^2 if X = 10, 12, 8, 7, 5
1265
1764
1785
1951

Let Y = 2, 5, 6, 7. Find \sum{j=1}^{4} Y_{j}
114
120
125
141

If X=10, 12, 8, 7, 5 Determine \sum{i=1}^{5} X_{i}
40
41
42
43

The scores obtained by 10 students in a practical class are as follows: 20, 50, 30, 40, 60. The mean score is _________
50
45
40
30

In the distribution having classes 0-4 5-9 10-14 15-19 20-24 . . . The upper class boundary for class 3 is _____________
12.5
13.5
14.5
15.5

Mean, Median and Mode are measures of _______________________
Position
Location
Placement
Category

In attitude test, the scores for 5 newly students are as stated here, Attitude: 5, 4, 3, 2, 1. The percentage attributable to attitude of score 3 is
22%
27%
25%
20%

Cluster Sampling is one whose members are ___________________________
Centrifugal
Homogeneous
Exterogeneous
pathogeneous

Systematic Sampling is a completely random sampling method
No
Yes
No Idea
Non of the above

Simple Random Sampling (SRS) is one for which each possible sample is _______ likely to be selected
Equally
Unequally
Simultaneously
particularly

The sample characteristics is _________________
Statistic
sample
Statistics
Parameter

_________ is a population characteristics
Statistic
sample
Phenomenon
Parameter

Statistics is the _____________ that deals with data collection, and summarising facts which are expressible in numerical form
Corollary
Science
Modern
Theory

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