# Arithmetic Elementary Statistics Quiz-3

Question 1

Time: 00:00:00
Let x be the upper limit of the modal class and y be the class mark of the median class of the following data:

What is the value ( x - y)?

13

13

12.5

12.5

11.8

11.8

10.7

10.7

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 2

Time: 00:00:00
If the mean of 26 observations is 29, and on adding four more observations, the new mean becomes 32. What is the mean of the last four observations?

32.45

32.45

51.5

51.5

37

37

50.8

50.8

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 3

Time: 00:00:00
Find the mode of the given set of numbers:-

6,11,5,8,6,8,5,11,8,9,7,11,5,6,8,9,11,8,7,6,9.

8

8

10

10

6

6

5

5

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 4

Time: 00:00:00
What is the difference between the mean and the median of the given data ?

5,9,8,15,12,9,2,19,21,11

2.3

2.3

1.5

1.5

1.1

1.1

3.5

3.5

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 5

Time: 00:00:00
If the mode of a data is 12 and the arithmetic mean is 9,the median is______________?

15

15

12

12

10

10

20

20

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 6

Time: 00:00:00
In 50 numbers 10 are threes,15 are fours,18 are fives and remaining are sixes.if a,b and c respectively represent the mean,mode and median of data,what is the value of a+2b-c?

10

10

12.65

12.65

9.94

9.94

8.34

8.34

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 7

Time: 00:00:00
If mean of a distribution is 10 and the standard deviation is 4. What is the value of the coefficient of variation?

40%

40%

35%

35%

20%

20%

50%

50%

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 8

Time: 00:00:00
The salary in rupees of 10 employees in a company per day is 50, 55, 60, 65, 70, 72, 75, 80, 84, 89.
What is the standard deviation in the above data?

13.751

13.751

11.983

11.983

9.432

9.432

5.754

5.754

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 9

Time: 00:00:00
The algebraic sum of the deviations of a set of n values from their mean is:

Zero

Zero

n - 1

n - 1

1

1

n - 2

n - 2

Once you attempt the question then PrepInsta explanation will be displayed.

Start

Question 10

Time: 00:00:00
If ‘X’ is a random variable, taking values ‘x’, probability of success and failure being ‘p’ and ‘q’ respectively and ‘n’ trials being conducted, then what is the probability that ‘X’ takes values ‘x’? Use Binomial Distribution

P(X = x) = nCx px qx

P(X = x) = nCx px qx

P(X = x) = xCn qx p(n-x)

P(X = x) = xCn qx p(n-x)

P(X = x) = nCx px q(n-x)

P(X = x) = nCx px q(n-x)

P(x = x) = xCn pn qx

P(x = x) = xCn pn qx

Once you attempt the question then PrepInsta explanation will be displayed.

Start

["0","40","60","80","100"]
["Need more practice!","Keep trying!","Not bad!","Good work!","Perfect!"]

Personalized Analytics only Availble for Logged in users

Analytics below shows your performance in various Mocks on PrepInsta

Your average Analytics for this Quiz

Rank

-

Percentile

0%

Completed

0/0

Accuracy

0%