If actual value =140 and trend=180 then the seasonal variation will be equal to __________ .

• A) 80
• B) 320
• C) -40
• D) 40

If sx=2, sy = 4 and sxy =10 then correlation coefficient ‘r ‘is

• A) 3.54
• B) 0.80
• C) 1.12
• D) 1.25

Which inputs are needed for the RSQ function in Excel?

• A) One array of data.
• B) Only the independent variable.
• C) Only the dependent variable.
• D) Two arrays of data (independent and dependent variables).

Choose the correlation that describes the strongest relationship between two variables

• A) - .25
• B) .25
• C) - .70
• D) .60

The mode of the words in the word CORRELATION is

• A) L
• B) Both R and O
• C) O
• D) R

A relationship between the three variables X, Y AND Z is described as Z=a+bX+cY is called

• A) Quadratic Equation
• B) Linear regression
• C) Non Linear Equation
• D) Linear Equation

Which of the following is used most frequently measures of dispersion because of its statistical properties and interpretive value?

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

The slope of the regression line may be

• A) Positive
• B) Negative
• C) Zero
• D) All of these

For the known values of dependent variables y and independent variable x, the equation for the intercept of the regression line is ………

• A) $$a = Y + bX$$
• B) $$a = \bar Y - b\bar X$$
• C) $$a = Y - bX$$
• D) $$a = \bar Y + b\bar X$$

If the data collected from a factory in three shifts; morning, afternoon and evening for four days. Then average of one day is known as

• A) Moving Average
• B) None
• C) both
• D) Weighted average

The points in scatter diagram show

• A) None
• B) No tendency to cluster around a straight line
• C) always relation between two variables
• D) tendency to cluster around a straight line

In regression equation Y on X, if slope is zero then regression equation is a straight line parallel to

• A) Y-axis
• B) X-axis
• C) None of above
• D) Y = X

In regression equation Y = a + bX,

• A) Y represents the value of the tan θ.
• B) Y represents the slope of the line.
• C) Y represents the dependent variable.
• D) Y represents the independent variable.

Averages that are calculated in method of moving average is called _________.

• A) Geometric mean
• B) Arithmetic mean
• C) Median
• D) Mode

The strength of associations between two variables is said to be very strong if the value of correlation coefficient is

• A) 1
• B) Infinity
• C) -1
• D) both 1 and -1

If the values of variables are increasing or decreasing in the same direction then such kind of correlation is referred as

• A) Negative Correlation
• B) Positive Correlation
• C) Zero Correlation
• D) Perfect Correlation

Only possibility of the comparison of variations of two data sets arise if

• A) two data sets have the same unit of measurement but are
• B) two data sets are homogeneous and have same units
• C) neither two sets are homogeneous nor have the same units
• D) two data sets are homogeneous but may have different units

The degree to which numerical data tend to spread about an average value is called

• A) Variation
• B) Median
• C) Mode
• D) Mean

The sum of deviations from mean is ........

• A) -1
• B) 2
• C) 1
• D) 0

The correlation coefficient r is the ……….mean of the two regression coefficients

• A) Arithmetic
• B) Harmonic
• C) None of these
• D) Geometric