The correlation coefficient provides:

• A) A measure of the extent to which changes in one variable cause changes in another variable.
• B) A measure of the strength of the linear association between two categorical variables.
• C) A measure of the strength of the linear association between two quantitative variables
• D) A measure of the strength of the association (not necessarily linear) between two categorical variables.

Suppose that samples of polythene bags from two manufacturer A and B are tested by a buyer for bursting pressure. Following result on the basis of sample has been observer
Manufacturer A: Mean = 21, Standard Deviation= 4.875 and Coefficient of Variation = 23.32%
Manufacturer B: Mean = 21.81, Standard Deviation = 7.074 and Coefficient of Variation = 32.44%
Which manufacturer’s bag has more uniform pressure?

• A) Manufacturer B
• B) Manufacturer A
• C)
• D)

The value of dependant variable decreases with increase in the value the independent variable in

• A) Positive linear relationship
• B) Negative linear relationship
• C) Strong relationship
• D) Week relationship

The standard deviation cannot assume a negative value.

• A) true
• B) false
• C)
• D)

$\frac{{\sum {{{\left( {X - \bar X} \right)}^2}} }}{{N - 1}}$ is the formula for

• A) Standard Deviation for Sample
• B) Variance for Sample
• C) Standard Deviation for Population
• D) Variance for Population

If a scatter plot with a regression line has a slope greater than zero, what does this suggest about the relationship between the variables?

• A) Negative correlation
• B) Positive correlation
• C) Perfect correlation
• D) No correlation

For the regression line:Y=a+bX, 'b' is the

• A) Slope of the regression line
• B) x-intercept
• C) y-intercept
• D) none of these

If actual value =161 and trend=195 then the seasonal variation will be equal to __________.

• A) 161
• B) 356
• C) -34
• D) 34

Coefficient of variation shows dispersion of the

• A) standard deviation about mean
• B) standard deviation about mode
• C) variance about mean
• D) variance about mode

If the correlation coefficient is a positive value, then the slope of the regression line ……….

• A) cannot be zero
• B) can be either negative or positive
• C) must also be positive
• D) can be zero

Method which does not give the trend value at the beginning and also at the end is called _________ .

• A) Moving average method
• B) Ratio to moving average method
• C) Simple average method
• D) Ratio to trend method

If a set of bivariate data (of two variables) is traced in XY-plane and this scattered plot is approximated to get a straight line: (x/2)+1= 0. Then its Y-intercept is

• A) 0
• B) -1/2
• C) None of these
• D) -2

Slope of a line is the

• A) The horizontal distance divided by the vertical distance between any two points on the line
• B) The distance of a origin from the line on horizontal axis
• C) The vertical distance divided by the horizontal distance between any two points on the line
• D) The distance of origin from the line on vertical axis

In the equation Y=2+3X the intercept is

• A) 4
• B) 2
• C) 3
• D) 1

The equation of the regression line is: Y = a + bx. The variable a is the value of

• A) The slope of the regression line
• B) The independent variable
• C) The Y- interecept
• D) The X- intercept

Which of the following represents the intercept in a regression line?

• A) Rate of change of the dependent variable.
• B) Average value of the dataset.
• C) Value of the dependent variable when the independent variable is zero.
• D) Strength of the correlation.

Which method of trend analysis is useful for data not having a pronounced trend or seasonality?

• A) Multiplicative model
• B) Decomposition model
• C) Trend analysis
• D) Exponential smoothing method

Which of the following arguments can be used as input for the SLOPE function in Excel?

• A) Numeric values and text values.
• B) Any type of data.
• C) Only positive numeric values.
• D) Only numeric values.

Rise in the price of air tickets on eid festival is an example of ___________ .

• A) None of these
• B) Irregular trend
• C) Seasonal trend
• D) Cyclic trend

Which of the following is correct formula to find the Y-intercept in a simple linear regression model with the independent variables in cells A2:A10 and the dependent variables in cells B2:B10.

• A) =INTERCEPT(B2:B10) / INTERCEPT(A2:A10)
• B) =INTERCEPT(B2:B10, A2:A10)
• C) =INTERCEPT(A2:B10, B2:A10)
• D) =INTERCEPT(A2:A10) * INTERCEPT(B2:B10)