The average of the squared deviations, where deviations are taken from the mean is called.....

• A) Average deviation
• B) Range
• C) Variance
• D) Semi-inter quartile range

If the coefficient of correlation is equal to1 then the correlation is..........

• A) Perfect positive quadratic correlation
• B) None of these
• C) Perfect negative linear correlation
• D) Perfect positive linear correlation

In scatter diagram if both variables X and Y tend to move in the same direction the correlation is called

• A) Curvilinear
• B) Negative
• C) No Correlation
• D) Positive

The mathematical equation describing the liner relation is

• A) Y = x
• B) Y = a + bx
• C) Y = a + bx^2+C
• D) Y = C

known_y’s and known_x’s represent …………………….. in the excel syntax of intercept function that is INTERCEPT(known_y’s,known_x’s).

• A) only dependent set of observations
• B) only independent set of observations
• C) independent and dependent set of observations respectively
• D) dependent and independent set of observations respectively

Given a linear regression model with a slope of 0.5 and an intercept of 4, what is the predicted y-value when x is 8?

• A) 10
• B) 12
• C) 6
• D) 8

In scatterplot the dependent variable is plotted on

• A) y-axis
• B) x-axis
• C) any axis
• D) None of these.

Set of observations recorded at an equal interval of time is called ________ .

• A) Harmonic series
• B) Time series
• C) Geometric series
• D) Arithmetic series

For the excel syntax, SLOPE(known_y’s,known_x’s), if the known_y’s and known_x’s have different number of data points, which of the following errors it returns ?

• A) #REF!
• B) #NAME?
• C) #N/A
• D) #Value!

An arrangement of data by successive time periods is called

• A) Linear regression
• B) Time Series
• C) Exponential smoothing
• D) Representation of data

If the correlation coefficient is -0.75, what does this indicate about the relationship between two variables?

• A) Strong positive correlation
• B) Weak positive correlation
• C) Weak negative correlation
• D) Strong negative correlation

The equation of regression line is y + 5x = 0. What will be the intercept?

• A) 1
• B) 5
• C) 0
• D) -5

What does a positive correlation coefficient indicate?

• A) Both variables are constant.
• B) As one variable increases, the other increases.
• C) As one variable increases, the other decreases.
• D) There is no relationship between the variables.

In the regression line equation $Y = a + bX;\,\,b$ is called the _______.

• A) Y -intercept
• B) Slope
• C) None of these
• D) X-intercept

In the model y = mx + a, y is also known as the ……………….

• A) Predicted (dependent) variable
• B) Independent variable
• C) Predictor variable
• D) Explanatory variable

In the regression line equation $Y = a + bX;\,\,a\,$ is called the _______.

• A) None of these
• B) Slope
• C) Y-intercept
• D) X-intercept

In regression analysis, when we plot the values of dependent and independent variables, the resulting set of points is called

• A) Scatter Diagram
• B) Pie Graph
• C) Histogram
• D) Venn diagram

If Summation(X) = 55 , Summation(Y) = 34 , Summation(XY) = 223 , Summation((X^2) = 525 , n = 7
Then Slope of data is

• A) 0.6978
• B) -0.8910
• C) 0.3187
• D) -0.47538

In formula RSQ(known_y's,known_x's), the arguments must be either

• A) numbers or names.
• B) references that contain numbers..
• C) arrays.
• D) all options are valid.

The standard deviation of c (constant) is

• A) 2c
• B) c
• C) cannot be determine
• D) zero