1. Out of sixteen observations arranged in an ascending order, the 8th and 9th observations are 25 and 27. Then, find the median?
a. 26
b. 27
c. 25
d. 26.5
2. Mode of a set of observations is the value which
a. Is the mean of the middle two observations
b. Is the sum of the observations
c. Occurs most frequently
d. Divides the observations into two equal parts
3. Find the mode of 4, 6, 7, 8, 12, 11, 13, 9, 13, 9, 7, 8, and 9?
a. 7
b. 6
c. 13
d. 9
4. For which set of data does the median equal the mode?
a. 3, 4, 5, 6, 6
b. 3, 3, 4
c. 3, 3, 4, 5
d. 3, 3, 4, 5, 6
5. One of the sides of a frequency polygon is
a. Neither of the coordinate axes
b. Either of the coordinate axes
c. The y-axis
d. The x-axis
6. Which of the following is not a measure of central tendency?
a. Mode
b. Standard deviation
c. Mean
d. Median
7. Find the mean of first four prime numbers?
a. 4.25
b. 3.75
c. 4.5
d. 4
8.
a. 1
b. n – 1
c. – 1
d. 0
9. If each observation of the data is increased by 3, then their mean
a. Becomes 3 times the original mean
b. Remains the same
c. Is decreased by 3
d. Is increased by 3
10. Find the median for the digits 1, 2, 3… 9?
a. 4.5
b. 5
c. 5.5
d. 4

## Chapter - 14 Statistics Quiz-2 | Math Class 9th

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