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Business Statistics and Research Methods
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Q961

The numerical value of the standard deviation can never be negative. The positive square root of the mean of the squares of the deviations of observations from their mean is called:

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Q962

Which of the statement(s) are true about 'measures of dispersion'?
1.The divergence of a set of observation
2. The concentration of a set of observation

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Q963

Primary data collected through direct personal interview is suitable for:

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Q964

The first three moments of a distribution about the mean X are 1, 4 and 0. The distribution is:

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Q965

Mode is a positional average which is used to deal with which type of data?
1. Quantitative data
2. Qualitative data

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Q966

Assertion (A) The two lines of regression can never be parallel.
Reason (R) The two lines of regression always pass through common point (x · y). Therefore, they can never be parallel.

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Q967

Statistical mean, which is not affected by extreme values

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Q968

The farther the two regression lines cut each other

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Q969

Which of the following is correct in a negatively skewed distribution?

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Q970

Which of the following conditions need to be fulfilled for applicability of T- test?

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Q971

Statistical average has significance due to following sequence.
1. To present huge mass of data ina summarised form.
2. To facilitate comparison of different sets of data.
3. To help decision-making.
Select the correct answer using the options given below

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Q972

We call the classification of employees on the basis of education and attributes

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Q973

If unexplained variation between variables X and Y is 36%, what is the coefficient of correlation between the variables?

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Q974

Consider the following statements.
Statement-I: When a null hypothesis gets rejected in statistical hypothesis testing, it is known as II type error in hypothesis testing.
Statement-II: When a sample is small sized and parametric value of the standard deviation is not known, z-test is the most appropriate test for hypothesis testing.

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Q975

Goodness of fit of a distribution is tested by:

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Q976

The most important factors causing seasonal variations are

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Q977

Regression model is a statistical framework for developing a mathematical equation that describes how:

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Q978

Which of the following statement(s) is/are correct?

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Q979

If the number of observations is such that n_x n_y is large (n > 20), a normal approximation can be used with

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Q980

Positive perfect correlation is

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