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 yaxis
d. The xaxis
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 Quiz2  Math Class 9th
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Question 1 of 10
1. Question
Out of sixteen observations arranged in an ascending order, the 8th and 9th observations are 25 and 27. Then, find the median?
Correct
The median is the middle score for a set of data that has been arranged in ascending or descending order of magnitude.
If number of observation even (as in this example), then median is the average of two middle numbers.
Hence average of 25 and 27 is 26
So median is 26
Incorrect
The median is the middle score for a set of data that has been arranged in ascending or descending order of magnitude.
If number of observation even (as in this example), then median is the average of two middle numbers.
Hence average of 25 and 27 is 26
So median is 26

Question 2 of 10
2. Question
Mode of a set of observations is the value which
Correct
In statistics, the mode in a list of numbers refers to the integers that occurs most number of times.
Incorrect
In statistics, the mode in a list of numbers refers to the integers that occurs most number of times.

Question 3 of 10
3. Question
Find the mode of 4, 6, 7, 8, 12, 11, 13, 9, 13, 9, 7, 8, and 9?
Correct
In statistics, the mode in a list of numbers refers to the integers that occurs most number of times.
For the set of numbers, 9 occurs three times i.e. more than any other number in the list.
Incorrect
In statistics, the mode in a list of numbers refers to the integers that occurs most number of times.
For the set of numbers, 9 occurs three times i.e. more than any other number in the list.

Question 4 of 10
4. Question
For which set of data does the median equal the mode?
Correct
The median is the middle score for a set of data that has been arranged in ascending or descending order of magnitude.
Mode in a list of numbers refers to the integers that occurs most number of times.
For the above list of observations
Both median and mode is 3
Incorrect
The median is the middle score for a set of data that has been arranged in ascending or descending order of magnitude.
Mode in a list of numbers refers to the integers that occurs most number of times.
For the above list of observations
Both median and mode is 3

Question 5 of 10
5. Question
One of the sides of a frequency polygon is
Correct
In frequency polygon xaxis represents data value whereas yaxis is used represent the frequencies of the data.
We include one class below lowest value and one class above highest value with zero frequencies. The graph touches the xaxis at these points.
So, one sides of the frequency polygon is xaxis.
Incorrect
In frequency polygon xaxis represents data value whereas yaxis is used represent the frequencies of the data.
We include one class below lowest value and one class above highest value with zero frequencies. The graph touches the xaxis at these points.
So, one sides of the frequency polygon is xaxis.

Question 6 of 10
6. Question
Which of the following is not a measure of central tendency?
Correct
A measure of central tendency is a single value that attempts to describe a set of data.
Mean, median & mode are the measures of central tendency.
Standard deviation is not the measure of central tendency
Incorrect
A measure of central tendency is a single value that attempts to describe a set of data.
Mean, median & mode are the measures of central tendency.
Standard deviation is not the measure of central tendency

Question 7 of 10
7. Question
Find the mean of first four prime numbers?
Correct
The mean is equal to the sum of all the values in the data set divided by the number of values in the data set.
The first five prime numbers are 2,3,5,7,
There sum is 2+3+5+7=17
So mean is 17/4 = 4.25Incorrect
The mean is equal to the sum of all the values in the data set divided by the number of values in the data set.
The first five prime numbers are 2,3,5,7,
There sum is 2+3+5+7=17
So mean is 17/4 = 4.25 
Question 8 of 10
8. Question
Correct
Incorrect

Question 9 of 10
9. Question
If each observation of the data is increased by 3, then their mean
Correct
Since mean is equal to the sum of all the values in the data set divided by the number of values in the data set.
So increase in the value of each observation will also increase the mean (average) by 3.
Incorrect
Since mean is equal to the sum of all the values in the data set divided by the number of values in the data set.
So increase in the value of each observation will also increase the mean (average) by 3.

Question 10 of 10
10. Question
Find the median for the digits 1, 2, 3… 9?
Correct
The median is the middle score for a set of data that has been arranged in ascending or descending order of magnitude.
So for numbers 1, 2, 3,4,5,6,7,8,9
We have here odd number of observations.
5 is in middle, and 4 number are before 5 and 4 numbers are after 5.
Incorrect
The median is the middle score for a set of data that has been arranged in ascending or descending order of magnitude.
So for numbers 1, 2, 3,4,5,6,7,8,9
We have here odd number of observations.
5 is in middle, and 4 number are before 5 and 4 numbers are after 5.