Statistics Test

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Statistics Test - 8

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Weekly Quiz Competition

Question 1
1 / -0

The median for the the digits 1, 2, 3, …, 9 is

A
5.5

B
5

C
4.5

D
4

Solution

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...9

5 is the median
Question 2
1 / -0

The marks obtained by 10 students in a mathematics test are 75, 90, 70, 50, 70, 50, 75, 90, 70 and 75. Their median mark is

A
72.5

B
70

C
75

D
71.5

Solution

The median is the middle value for a set of data that has been arranged in ascending or descending order of magnitude.

arrange the given observations in ascending order

50, 50, 70, 70, 70, 75, 75, 75, 90, 90

here two numbers 70 and 75 are in the middle

so, median is average of 70 and 75 i.e 72.5.
Question 3
1 / -0

Out of sixteen observations arranged in an ascending order, the 8 ^th and 9 ^th observations are 25 and 27. Then, the median is

A
27

B
26.5

C
26

D
25

Solution

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 obseravtion 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 4
1 / -0

Mode of a set of observations is the value which

A
is the mean of the middle two observations

B
occurs most frequently

C
is the sum of the observations

D
divides the observations into two equal parts

Solution

In statistics, the mode in a list of numbers refers to the integers that occurs most number of times.
Question 5
1 / -0

The mode of 4, 6, 7, 8, 12, 11, 13, 9, 13, 9, 7, 8, 9 is

A
6

B
7

C
9

D
13

Solution

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 6
1 / -0

The given data is 3, 5, 6, 7, 5, 4, 7, 5, 6, x, 8 and 7. Then the value of x for which the mode of the above data will be 7, is

A
5

B
6

C
7

D
8

Solution

The mode in a list of numbers refers to the integers that occurs most number of times.

In the given list both 5 and 7 occur three times

for 7 to be mode of the list it should occur more number of times than any other number

so x should be 7

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Re-Attempt Weekly Quiz Competition

Statistics Test - 8

Result

Statistics Test - 8

Score

-

Rank

-

SHARING IS CARING

Question 1

5.5

5

4.5

4

Solution

Question 2

72.5

70

75

71.5

Solution

Question 3

27

26.5

26

25

Solution

Question 4

is the mean of the middle two observations

occurs most frequently

is the sum of the observations

divides the observations into two equal parts

Solution

Question 5

6

7

9

13

Solution

Question 6

5

6

7

8

Solution

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