Statistics Questions and answers

  1. Elementary Mathematics
    1. Quadratic Equations
    2. Simplification
    3. Area and perimeter
    4. Volume and surface area
    5. Geometry
    6. Trigonometry
    7. Polynomials
    8. Height and Distance
    9. Simple and Decimal fraction
    10. Indices and Surd
    11. Logarithms
    12. Trigonometric ratio
    13. Straight lines
    14. Triangle
    15. Circles
    16. Quadrilateral and parallelogram
    17. Loci and concurrency
    18. Statistics
    19. Rectangular and Cartesian products
    20. Rational expression
    21. Set theory
    22. Factorisation
    23. LCM and HCF
    24. Clocks
    25. Real Analysis
51). If the arithmetic mean of the two number is 10 and then geometric mean is 8, the numbers are
A). 20, 5
B). 16, 4
C). 15, 5
D). 12, 8
52). The mode of the numbers 6, 5, 5, 4, 5, 5, 4, 4, 6 is
A). 4
B). 5
C). 6
D). None of these
53). The less reliable measure of dispersion is
A). Regression coefficient
B). Standard deviation
C). Correlation coefficient
D). Range
54). The mean of 100 observations is 60. What will be the new value of mean if 8 1s subtracted from each observation and then divided by 4.
A). 50
B). 52
C). 13
D). 14
55). The most stable measure of central tendency is
A). the mean
B). the median
C). the mode
D). geometric mean


56). Two dice are thrown together. The probability of getting a total of 3 or 8 is
A). \( \Large \frac{24}{36} \)\
B). \( \Large \frac{8}{36} \)
C). \( \Large \frac{11}{36} \)
D). \( \Large \frac{7}{36} \)
57). The height of 5 persons are 59, 63, 68, 60, 72 inches. The value of range is
A). 10
B). 13
C). 12
D). 15
58). A bag contains 4 white, 6 red and 5 blue balls out of which one ball is drawn at random. The probability that it is neither white nor red is
A). \( \Large \frac{5}{15} \)
B). \( \Large \frac{4}{15} \)
C). \( \Large \frac{6}{15} \)
D). \( \Large \frac{3}{15} \)
59). The probability of throwing either 7 or 11 with two dice is
A). \( \Large \frac{1}{6} \)
B). \( \Large \frac{2}{9} \)
C). \( \Large \frac{1}{8} \)
D). \( \Large \frac{23}{108} \)
60). If A and B are the mutually exclusive events then \( \Large P \left(A\cup B\right) \) will be
A). \( \Large P \left(A\right)+P \left(B\right) \)
B). \( \Large P \left(A\right)+P \left(b\right)+POA\cap B \)
C). \( \Large P \left(a\right)+P \left(B\right)-P \left(A\cup B\right) \)
D). \( \Large P \left(A\right)+P \left(B\right)-P \left(A\cap B\right) \)
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