1
NDA Mathematics 10 April 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following frequency distribution for the next three (03) items follow :
Class | 0-20 | 20-40 | 40-60 | 60-80 | 80-100 |
Frequency | 17 | p + q | 32 | p - 3q | 19 |
The total frequency is 120. The mean is 50.
What is the value of q ?
2
NDA Mathematics 10 April 2022
MCQ (Single Correct Answer)
+2.5
-0.83
Consider the following frequency distribution for the next three (03) items follow :
Class | 0-20 | 20-40 | 40-60 | 60-80 | 80-100 |
Frequency | 17 | p + q | 32 | p - 3q | 19 |
The total frequency is 120. The mean is 50.
If the frequency of each class is doubled, then what would be the mean?
3
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
When the measure of central tendency is available in the form of mean, which one of the following is the most reliable and accurate measure of variability?
4
NDA Mathematics 14 November 2021
MCQ (Single Correct Answer)
+2.5
-0.83
Direction: Consider the following for the next two (02) items that follow.
Two regression lines are given as 3x - 4y + 8 = 0 and 4x - 3y - 1 = 0.
Consider the following statements:
1. The regression line of y on x is $\rm y = \frac{3}{4}x+2$
2. The regression line of x on y is $\rm x = \frac{3}{4}y+\frac{1}{4}$
Which of the above statements is/are correct?
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