In a dataset, which of the following would impact the mean most?

• A) Extreme low values
• B) Negative values
• C) Extreme high values
• D) Extreme values

Which of the following is the measure of central tendency?

• A) Variance analysis
• B) Arithmetic Mean
• C) None of these
• D) Standard deviation

A bar graph uses ……to show data.

• A) Points
• B) Bars
• C) Lines
• D) Pictures

If the total frequency is 20, what is the relative frequency for a class interval with a frequency of 5?

• A) 0.025
• B) 0.25
• C) 0.015
• D) 0.15

The average of the first and third quartiles is called…

• A) Midhinge
• B) Range
• C) Midrange
• D) Interquartile range

The variance is

• A) Negative
• B) In the same units as the original data.
• C) Found by dividing by N by the mean.
• D) Found by squaring the standard deviation

What does the slope of the linear regression line represent?

• A) Horizontal distance divided by vertical distance between two points on the line.
• B) Vertical distance from the line.
• C) Rate of change of regression line.
• D) Horizontal distance between two points on the line.

The straight line passing through points (1, 2), (-15, 2) and (15, 2) has slope

• A) 1
• B) 2
• C) zero
• D) infinity

If actual value =230 and trend=182 then the value of seasonal variation will be equal to __________.

• A) 320
• B) 80
• C) 40
• D) 48

${\sigma ^2} = \frac{{\sum {{{\left( {X - \mu } \right)}^2}} }}{N}$ is the formula for

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

If actual value is 180 and trend is 150, the seasonal variation is

• A) -30
• B) -45
• C) 30
• D) 40

If scores of openness to experience tend to be higher for students who have higher interest for adventure, which of the following is a reasonable correlation between openness to experience and interest for adventure?

• A) -0.21
• B) +0.21
• C) -0.78
• D) +0.78

Which of the following factors are responsible for seasonal variation?

• A) All of these.
• B) Weather
• C) Social custom
• D) Festival

When a distribution consists of different observations then population standard deviation and sample standard deviation are relatively large

• A) False
• B) True
• C)
• D)

The correlation co-efficient varies from

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

If the equation of regression line is y = 5, then what result will you take out from it?

• A) The line is parallel to x-axis.
• B) The line passes through origin.
• C) The line passes through (5, 0)
• D) The line is parallel to y-axis.

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

• A) False
• B) True
• C)
• D)

If Sxy = -2.9, Sx = 1.979 and r = -0.077, then variance of Y is

• A) 360.13
• B) 355.13
• C) 365.13
• D) 370.13

An insurance company wants to predict sales from the amount of money they spend on advertising. Which would be the independent variable?

• A) Both sales and advertising
• B) sales
• C) advertising
• D) insufficient information to decide

Which method helps to draw a line between the set of scattered points

• A) Least square method
• B) Least fit method
• C) Correlation method
• D) Regression method