MCQ 23

             51.   Appropriately used in statistical quality control charts of manufactured products, daily temperature, stock prices etc.

A.       Variance.

B.        Standard deviation.

C.        Quartile deviation.

D.       Range.

            52.   Range is an/a

A.       Qualitative measure of dispersion.

B.        Absolute measure of dispersion.

C.        Relative measure of dispersion.

D.       Theoretical measure of dispersion,

             53.    The interquartile range is

A.       Random value.

B.        Measure of kurtosis.

C.        Measure of dispersion.

D.       Measure of skewness.

             54.    The interquartile range is defined by the difference between the

A.      Third and second quartile.

B.       Second and first quartile.

C.       Third and first quartile.

D.      Second and last quartile.

            55.   Half of interquartile range is called

A.      Semi-interquartile range.

B.       Semi-quartile range.

C.       Semi- interquartile value.

D.      Semi-range.

             56.   Quartile deviation is equal to

A.      Semi-interquartile range.

B.       Semi-quartile range.

C.       Semi- interquartile value.

D.      Semi-range.

             57.   Half of interquartile range is called

A.      Standard deviation.

B.       Quartile deviation.

C.       Deviation.

D.      Variance.

             58.   Median ± Q.D contains approximately

A.      45% of the data.

B.       70% of the data.

C.       60% of the data.

D.      50% of the data.

59.  When the defining variable is expressed in terms of location, we get

               A.     Placement distribution.

              B.     Poison distribution.

              C.     Wishart distribution.

              D.    Geographical distribution.

      60. Quartile deviation gives no information about the position of observations lying

A.      Between the two quartiles.

B.       Outside the two quartiles.

C.       Beyond the two quartiles.

D.      Near the two quartiles.

     61.   Quartile deviation is used in the situation where extreme observations are thought to be

A.           Representative.

B.            Unrepresentative.

C.            Very necessary.

D.           Relevant.

   62.         Quartile deviation is a/an

A.      Relative measure of dispersion.

B.       Qualitative measure of dispersion.

C.       Absolute measure of dispersion.

D.      Theoretical measure of dispersion.

    63.Relative measure of quartile deviation is called

A.      Co efficient of variation.

B.       Co efficient of quartile deviation.

C.       Co efficient of standard deviation.

D.      Co efficient of interquartle.

    64. The arithmetic of the deviations measured either from the mean or from median, all deviations being counted positive.

A.       Quartile deviation.

B.        Standard deviation.

C.        Deviation.

D.       Mean deviation

     65. The reason to count the deviations as positive i.e. to disregard the algebraic sign (+ and -) is to avoid the difficulty arising from the property that the sum of deviations of the observations from their mean is zero.

A.       In case of standard deviation.

B.        In case of quartile deviation.

C.        In case of mean deviation.

D.       In case of variance.

    66.The mean deviation is least when deviation is measured from the

A.       Mode.

B.        Median.

C.        Mean.

D.       H.M

    67. Mean deviation gives more information than the range or quartile deviations  as it is based on

A.       83% of the observations.

B.        80% of the observations.

C.        100% of the observations.

D.       75% of the observations.

   68. Does not give undue weight to occasional large deviations, so it is used in situations, where such deviations are likely to occur.

A.        Mean deviation.

B.         Quartile deviation.

C.         Range.

D.        Simple deviation.

69.M.D is an/a

A.        Absolute measure of dispersion.

B.         Relative measure of dispersion.

C.         Theoretical measure of dispersion.

D.        Qualitative measure of dispersion.

70.The positive square root of variance is called

A.       Quartile deviation.

B.        Mean deviation.

C.        Range.

D.       Standard deviation.

   71.Standard deviation is a measure of the average spread around the

A.       Mean.

B.        Mode.

C.        Median.

D.       G.M.

  72.The most useful measure of dispersion

A.       Range.

B.        Mean deviation.

C.        Standard deviation.

D.       Quartile deviation.

   73.      S² =  ∑(y_i-ӯ)²/n-1

Where n is replaced by (n-1) on the basis of argument that knowledge of any (n-1) deviation automatically determines the remaining deviations as the sum of n deviations must be zero.

A.       Population variance.

B.        Sample mean deviation.

C.        Population quartile deviation.

D.       Sample variance.

   74. Standard deviation is an/a

A.      Absolute measure of dispersion.

B.       Relative measure of dispersion.

C.       Qualitative measure of dispersion.

D.      Theoretical measure of dispersion.

   75.Standard deviation’s relative measure of dispersion is

A.       Coefficient of variance.

B.        Coefficient of standard deviation.

C.        Coefficient of standard error.

D.       Coefficient of kurtosis.

51	D	52	B	53	C	54	C	55	A
56	A	57	B	58	D	59	D	60	B
61	B	62	C	63	B	64	D	65	C
66	B	67	C	68	A	69	A	70	D
71	A	72	C	73	D	74	A	75	B