Statistics And Methodology MCQ - Statistics And Methodology Section 1

41 Management science model consists

A
Return on investment analysis
B
Break-even analysis model
C
Budgeting models
D
All of the above

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42 t is

A
Small test
B
Correlation
C
Large test
D
Regression analysis

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43 Given Σdxdy = 2350, Σd2x = 8250, Σd2y = 724, then r will be

A
+ 0.92
B
+0.96
C
+0.36
D
+0.76

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44 A random sample of 15 pairs of values of X and Y from a normal population gives a correlation coefficient of + 0.6. Is the correlation in the population significant?

A
r is significant with -1
B
r is significant with +1
C
r is significant
D
r is not significant

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Comment

N = 15, r = 0.6 Z = 1.1513 log 1 + r/1 - r = 1.1513 log 1 + 0.6/1 - 0.6 = 1.1513 log 4 = 1.1513 x 0.6021 = 0.6932 S.E.2 = 1/√(N - 3) = 1√(15 - 3) = 1√12 = 1/3.464 = 0.29 Z/(S.E.)2 = 0.6932/0.29 =2.39 > 1.96 Hence 'r' is significant at a 5% level of significance. The answer is (c).

45 What is the chance of drawing a queen in a draw from a pack of 52 cards?

A
1/9
B
1/13
C
1/14
D
1/12

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Comment

Total number of cases that can happen = 52 No. of favorable cases = No. of queens in a pack or 52= 4 The probability (P) will be - P = 4/52 = 13 Hence the answer is (b).