Quiz about Statistics

Question 1

While computing mean of grouped data, we assume that the frequencies are:

Accepted Answer

Covalent bond

Answer

Centred at the class marks of the classes

Answer

Evenly distributed over all the classes

Answer

Centred at the upper limits of the classes

Answer

Centred at the lower limits of the classes

Question 2

For the following distribution :
![](http://admin.getprephub.com/media/editor/2016%20Q_20210524185740049422.png)
The modal class is :

Accepted Answer

Covalent bond

Answer

$$30-40$$

Answer

$$10-20$$

Answer

$$30-40$$

Answer

$$50-60$$

Question 3

Consider the data
![](http://admin.getprephub.com/media/editor/2017%20Q_20210525095003706095.png)
The difference of the upper limit of the median class and the lower limit of the modal class is =

Accepted Answer

Covalent bond

Answer

$$20$$

Answer

$$10$$

Answer

$$19$$

Answer

$$38$$

Question 4

Consider the following frequency distribution of the heights of 60 students of a class.
![](http://admin.getprephub.com/media/editor/2018%20Q%201_20210525062926264342.png)
![](http://admin.getprephub.com/media/editor/2018%20Q2_20210525063001434173.png)
The upper limit of the median class in the given data is

Accepted Answer

Covalent bond

Answer

$$165$$

Answer

$$155$$

Answer

$$160$$

Answer

$$170$$

Question 5

If $$x_j^{\prime} s$$ are the mid-points of the class intervals of grouped data $$f_j^{\prime} s$$ are the corresponding frequencies are $$\bar{x}$$ is the mean, then $$\sum\left(f x_i-\bar{x}\right)$$ is equal to

Accepted Answer

Covalent bond

Answer

$$0$$

Answer

$$1$$

Answer

$$2$$

Answer

$$3$$

Statistics Gseb Class 10 Maths Problems and Solutions

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