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Business Statistics and Research Methods
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Q921

Calculate rank correlation coefficient from the following data.

X	59	69	39	49	29
Y	79	69	39	49	39

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Q922

Consider the following statements.
Statement (I): If the alternative hypothesis is as Ha: μ ≠ μ0; a researcher requires two-tailed test in hypothesis-testing.
Statement (II): The mean of the sampling distribution of mean is not equal to the parametric value of mean.

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Q923

In the regression equation X = a + bY, the X is called:

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Q924

If a study is "reliable", this means that:

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Q925

Match the following.

List-I	List-II
a. Level of significance	1. Sample mean is equal to population mean
b. Standard deviation of sampling distribution	2. Parameters
c. Numerical value that describes the characteristics of the population	3. Type I error
d. Normally distributed population	4. Standard error

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Q926

The mean plus and minus 1.96 standard deviation includes . . . . . . . . percent of the items of normal distribution.

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Q927

For more reliable survey results we should use

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Q928

If an event cannot take place, probability will be

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Q929

The curve of normal distribution is . . . . . . . . the horizontal axis.

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Q930

Which two of the following statements are true?
(1) The sum of the deviations from mean (ignoring algebraic signs) is greater than the sum of the deviations from median (ignoring algebraic signs)
(2) Standard deviation is independent of change of origin and change of scale
(3) In a symmetrical distribution, mean deviation equals 4/5 of standard deviation
(4) In a symmetrical and bell shaped distribution, quartile deviation is 1/3 of standard deviation
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Q931

Which amongst the given statement is true?

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Q932

Coefficient of variation is one of the following

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Q933

Which of the following is related to positive association of attributes?

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Q934

Which of the following is not an example of a discrete probability distribution?

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Q935

The mean of 200 terms is 48 and the standard deviation is 3. The sum of the squares of these terms will be-

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Q936

Which of the following can be calculated from a cumulative frequency curve?

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Q937

A statistical enquiry or investigation has to pass through in which of the following sequence?
1. Planning and statistical investigation
2. Editing and presenting data
3. Collection of data
4. Analysis of data
5. Interpretation and presentation of report
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Q938

The mean of an examination is 69, the median is 68, the mode is 67, and the standard deviation is 3. The measure of variation for this examination is:

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Q939

The middle value of an ordered array of numbers is the

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Q940

Correlation is said to be linear, when the

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