If the sample slope is 5.25, the population slope is 3.25, and the standard error is 0.25, what is the t-statistic?

• A) 8.0
• B) 9.5
• C) 10.5
• D) 3.25

The excel function INTERCEPT(known_y’s,known_x’s) can be used to determine the value of dependent variable when the independent variable is ………..

• A) 0
• B) -1
• C) 2
• D) 1

Smaller the P-value implies

• A) the regression equation best fits the data.
• B) more significant the result.
• C) the significance at 5% confidence level.
• D) less significant the result.

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

• A) Correlation
• B) Positive variance
• C) Variance
• D) Mean deviation

In a Simple linear regression, total number of variables are……….

• A) Two
• B) One
• C) Zero
• D) Three

Given a linear regression model with a slope of $-0.8$ and an intercept of $7$, what is the predicted y-value when x is 12?

• A) 5.6
• B) -2.6
• C) 8.6
• D) 3.6

-------------- measures the strength of the linear relationship between the dependent and the independent variable

• A) Simple correlation coefficient
• B) None of these
• C) Y intercept
• D) Distance value

The intercept of a line passing through origin is

• A) finite
• B) positive
• C) zero
• D) does not exists

If Mean of X = 20.143 , Mean of Y = 6 , and Slope = 0.181176
Then intercept of the data is

• A) 2.35
• B) 3.45
• C) 3.58
• D) 4.51

The rate of change along the regression line is called

• A) Curve
• B) Non Linear regression
• C) Slope
• D) Linear regression

To determine the strength of relationship between two variables, linear regression is graphically represented by ……………………

• A) Pie chart
• B) Histogram
• C) Bar chart
• D) Scatter diagram

Square of the deviation will be greater if

• A) value is coincident with mean
• B) value is far from mean
• C) value lies on the last quartile of data
• D) value is close to mean

There are two graphs G1 and G2. The graph G1 has r = 0.9 and the graph G2 has r = 0.5, then what result do you take out from it?

• A) G1 and G2 are equally scattered.
• B) No result can be drawn from the given data.
• C) G1 is less scattered than G2.
• D) G1 is more scattered than G2.

Standard deviation can be calculated by taking deviation from any measure of central tendency

• A) True
• B) False
• C)
• D)

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)+(y/3)+1= 0. Then its slope is

• A) 1/3
• B) 3/2
• C) 1/2
• D) -3/2

Scatter plots are used only for quantitative variables.

• A) False
• B) True
• C)
• D)

When r=0 it means that there is ..... between the random variables.

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

Rule to draw a scatter diagram is

• A) Both i. & ii.
• B) Regression variable along X-axis and dependent variable along Y-axis
• C) Dependent variable along Y-axis and Regression variable along X-axis
• D) None

The regression tool adds the $ sign in front of the column and row number to

• A) give input range for X and Y.
• B) give function RSQ.
• C) fix its location.
• D) give value of 95% confidence.

Let, Variation (Y) = n*Sum(y^2) – [Sum(y)]^2
Variation (X) = n*Sum(x^2) – [Sum(x)]^2 Then, the following formula of slope
b = {Sum(X*Y) – [ Sum(x)*Sum(y)] }/ Variation (X)

• A) c) Both (a) and (b)
• B) d)None of these
• C) b)for the regression line X on Y
• D) a)for the regression line Y on X