In scatter diagram the dependent variable is plotted on the

• A) y-axis
• B) x-axis
• C)
• D)

If Sxy = -3.27, Sx = 2.416 and r = -0.091, then Standard deviation of Y is

• A) 14.87
• B) 15.88
• C) 13.86
• D) 12.85

If many data points are close to the mean, then the standard deviation is -----------.

• A) Middle value
• B) 0
• C) Large
• D) Small

The moving averages can be used for -------------.

• A) forecasting purposes
• B) mode
• C) Middle value.
• D) Median

What is the slope of the line y = -3.4x - 2.5?

• A) 3.4
• B) -3.4
• C) -2.5
• D) 2.5

In case of variance, for the population, the sum of squares of the deviations is divided by

• A) Two more the number of values in the population i-e (N+2)
• B) One more the number of values in the population i-e (N+1)
• C) Exactly the number of values in the population i-e N
• D) One less the number of values in the population i-e (N-1)

The SLOPE and INTERCEPT functions in Excel are most commonly associated with which type of analysis?

• A) Regression analysis
• B) Statistical hypothesis testing
• C) Financial modeling
• D) Time series forecasting

If the value of r is 0.79 then there exist …………….. correlation

• A) strong positive linear
• B) None of these
• C) weak positive
• D) strong negative

Which of the following is a measure of central tendency?

• A) Range
• B) Mode
• C) Standard deviation
• D) Mean deviation

Suppose the slope of regression line is -16.36 and the intercept is 1.56, then the equation of regression line will be ---------------

• A) y – 16.36x = 1.56
• B) y – 1.56 = -16.36x
• C) y +16.36x = -1.56
• D) y + 1.56 = -16.36x

The measurement of measure of degree of to which any two variables vary together is called

• A) c)Both (a) and (b)
• B) b)Correlation
• C) d)None of these
• D) a)Regression Coefficient

All of the following are assumptions of the error terms in the simple linear regression model except

• A) normality
• B) constant variance
• C) variance of one
• D) error terms with a mean of zero

If the increase in one variable causes increase in the another variable, the form of correlation between the variables must be

• A) Perfect
• B) Imperfect
• C) Negative
• D) Positive

Prices are 2,4,6,8,10 and Moving averages are 4,6,8
then Actual- Trend are

• A) 3,2,1
• B) 3,4,5
• C) 0, 0,0
• D) 1, 2,3

Scatter plots are used only for ________.

• A) surplus variable
• B) mulivariables
• C) quantitative variables
• D) single variable

Which one is the correct option to calculate the slope of the regression line?

• A) $b = \frac{{n\sum {xy + \sum {x\sum y } } }}{{n\sum {{x^2} - {{\left( {\sum x } \right)}^2}} }}$
• B) $b = \frac{{n\sum {xy - \sum {x\sum y } } }}{{n\sum {{x^2} + {{\left( {\sum x } \right)}^2}} }}$
• C) $b = \frac{{n\sum {xy - \sum {x\sum y } } }}{{n\sum {{x^2} - {{\left( {\sum x } \right)}^2}} }}$
• D) $b = \frac{{n\sum {xy + \sum {x\sum y } } }}{{n\sum {{x^2} + {{\left( {\sum x } \right)}^2}} }}$

The minimum number of points required to calculate the intercept of a straight line is/are

• A) one
• B) two
• C) one or three
• D) three

In given Qrtly, data the first step in computing seasonal index is calculating:

• A) 4 qtr moving average.
• B) Discard highest and lowest values.
• C) 3 qtr. moving average.
• D) 4 qtr. Moving total.

The sum of the deviations about the mean are always:

• A) zero
• B) the range
• C) positive
• D) the standard deviation total

A scatter diagram:

• A) d) Both a and b are correct
• B) c) Does not allow negative values.
• C) a) Is a graphic tool designed to portray the relationship between variable.
• D) b) Uses interval or ratio scale data.