# Business Mathematics & Statistics Quiz

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| By Zubair
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Zubair
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Quizzes Created: 23 | Total Attempts: 32,448
Questions: 8 | Attempts: 2,268

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• 1.

### For a data, if mean > median then its distribution is:

• A.

Asymmetrical

• B.

Symmetrical

• C.

Left asymmetrical

• D.

Right asymmetrical

C. Left asymmetrical
Explanation
Symmetrical Distribution
mean = median = mode
Positively Skewed Distribution(Tilted to left)mean > median > mode
Negatively Skewed Distributionmode < median < mean(Tilted to right)

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• 2.

### In a positively skewed distribution:

• A.

The mean, median, and mode are all equal.

• B.

The mean is larger than the median

• C.

The median is larger than the mean.

• D.

The standard deviation must be larger than the mean or the median.

B. The mean is larger than the median
Explanation
Positively Skewed Distribution (Tilted to left) mean > median > mode
Negatively Skewed Distribution mode < median < mean (Tilted to right)

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• 3.

### As the regression line equation is y = ax + b, where b is:

• A.

The x-intercept

• B.

The y-intercept

• C.

The slope

• D.

None of these

B. The y-intercept
Explanation
Y = y-axis
a = slope
x = x-axis
b = y-intercept

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• 4.

### If strength of the association between X and Y is very weak, then r = ?

• A.

R = - 1

• B.

R = 0

• C.

R = 1

• D.

R = 2

B. R = 0
Explanation
If the strength of the association between X and Y is very weak, it means that there is no linear relationship between the two variables. In other words, the correlation coefficient (r) would be close to zero. A correlation coefficient of 0 indicates that there is no linear relationship between X and Y, and they are not related to each other in any way.

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• 5.

### My estimated regression line is Y = 17 + 4X. The intercept is equal to:

• A.

17

• B.

4

• C.

21

• D.

13

A. 17
Explanation
Y represents the dependent variable
X represents the independent variable
a represents the Y-intercept
(i.e. the value of Y when X is equal to zero)
b represents the slope of the line
(i.e. the value of the tan , where  represents the angle between the line and the horizontal axis)

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• 6.

### The variance of the 3, 3, 3, 3, 3 is:

• A.

Zero

• B.

One

• C.

Twice the standard standard deviation

• D.

Half of the range

A. Zero
Explanation
The variance of a set of numbers measures how spread out the numbers are from the average. In this case, all the numbers in the set are the same (3), so there is no variation or spread. Therefore, the variance is zero.

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• 7.

### The regression equation should only used:

• A.

When there is significant linear correlation

• B.

When there is significant mluticorrelation

• C.

When there is significant quadratic correlation

• D.

When there is significant simple correlation

A. When there is significant linear correlation
Explanation
The regression equation should only be used when there is a significant linear correlation between the variables. This means that there is a strong relationship between the independent and dependent variables that can be described by a straight line. If there is no linear correlation or if the correlation is not significant, using a regression equation may not provide accurate or meaningful results.

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• 8.

### The point where a straight line cuts the x-axis is called:

• A.

Slope

• B.

Starting point

• C.

Y-intercept

• D.

X-intercept

D. X-intercept
Explanation
The x-intercept is the point at which a straight line intersects the x-axis. It represents the value of x when y is equal to zero. In other words, it is the x-coordinate of the point where the line crosses the x-axis. The y-intercept, on the other hand, represents the value of y when x is equal to zero. The slope refers to the steepness of the line, while the starting point is not a commonly used term in relation to the x-axis.

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• Current Version
• Dec 22, 2023
Quiz Edited by
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• Jun 17, 2009
Quiz Created by
Zubair

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