# STT 102: INTRODUTORY STATISTICS TMA 4 QUESTION AND ANSWER

STT 102: INTRODUTORY STATISTICS TMA 4

Question 1. This is for question 1 to 4. Twenty score of a students are as below. Find Sw1w1

Data layout: study this that below and answer the question that follow

 Score W1 80 40 75 50 30 50 75 60 65 80 W2 75 50 70 50 35 45 80 65 65 85

1. 150.5
2. 5
3. 25
4. 5

Answer to question is D. 6312.5

Question 2. Consider attitude score for five newly admitted nursing students toward alcohol patients below: attitude: 5, 4,3,2,1. The percentage due to attitude 3 is__________?

1. 4
2. 3
3. 5
4. 2

Answer to question 2 is D. 0.2

Question 3. From the table in question 1. Evaluate Sw2w2

Data layout: study this that below and answer the question that follow

 Score W1 80 40 75 50 30 50 75 60 65 80 W2 75 50 70 50 35 45 80 65 65 85
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1. 2440
2. 2410
3. 2430
4. 2420

Answer to Question 3 is A. 2440

Question 4. Find the value of Sw1w2

Data layout: study this that below and answer the question that follow

 Score W1 80 40 75 50 30 50 75 60 65 80 W2 75 50 70 50 35 45 80 65 65 85

In the question 1 above

1. 4325
2. 4235
3. 4335
4. 4135

Answer to question is C. 4335

Question 5. In the distribution of recipient nursing scholarship of 25, 21, 22,20,19,30,27,28,32 and 18. Determine the variance?

1. 6
2. 6
3. 6
4. 6

Question 6. The data below represent systolic blood pressure readings (mmHg) using spearman Rank order correlation method, determine correlation coefficient

Ts

The data below represent systolic blood pressure readings (mmHg) the question that follow of the two readings

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Data layout: study this that below and answer the question that follow

 Reading N1 130 140 136 150 120 165 N2 125 135 135 160 160 125

1. rs = -0.32
2. rs = -0.23
3. rs = 0.23
4. rs = 0.32

Answer to question 6 is A. rs = -0.32

Question 7. The following data collected on ten infants. Fin the standard error, §yx where

S2yx =

The observed value and data below represent systolic blood pressure readings (mmHg) the question that follow

The predicted values

 Age week 6 3 2 2 1 3 4 5 7 4 WeightKG 6 2.5 2 2 2 3 4 4.5 6.5 3.5

1. yx = 2.75
2. yx = 5.75
3. yx = 4.75
4. yx = 3.75

Answer to question 7 is D. §yx=3.75

Question 8. One precaution in correlation is that_____________?

1. Correlation is not a caution
2. Correlation is a caution
3. Correlation does not apply to a range of values observed for two variable
4. Correlation mean that one variable is not independent of the other
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Answer to question 8. Is B. correlation is a caution

Question 9. Determine correlation coefficient r using the above values or from your direct calculation

Data layout: study these data below and answer the questions that follow

 Score W1 80 40 75 50 30 50 75 60 65 80 W2 75 50 70 50 35 45 80 65 65 85

1. 9
2. 91
3. 92
4. 95

Answer to question 9 is D. 0.95

Question 10. Given the general form of linear equation

Y = b + b1X if b1

˃0, then the line slopes

1. Flat
2. Parallel
3. Upward
4. Downward

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