Question Text
Question 1 :
State True or False: To find the mean of grouped data, it is assumed that the frequency of each class interval is centred around its mid-point.
Question 2 :
If n is the total number of observations, locate the class whose cumulative frequency is greater than (and nearest to) $\frac{n}{2}$.Is it TRUE or FALSE that, this class is called the median class.
Question 3 :
Construction of a cumulative frequency table is useful in determining the
Question 4 :
Consider the following frequency distribution of the heights of 60 students of a class :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b8e273b2305849799c9.PNG' />
The sum of the lower limit of the modal class and upper limit of the median class is?
Question 5 :
State True or False. In a grouped frequency distribution, it is not possible to determine the mode by looking at the frequencies. To find the mode of grouped data, locate the class with the maximum frequency. This class is known as the modal class. The mode of the data is a value inside the modal class.
Question 6 :
In the following distribution :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b8e273b2305849799c8.PNG' />
The number of families having income range (in Rs) 16000 – 19000 is
Question 7 :
Consider the following frequency distribution :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b70273b2305849799a2.PNG' />
The upper limit of the median class is
Question 8 :
In the formula $\bar{x} = a + \frac{f_i d_i}{f_i}$ for finding the mean of grouped data $d_i$’s are deviations from a of
Question 9 :
Consider the data:
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b72273b2305849799a5.jpg' />
The difference of the upper limit of the median class and the lower limit of the modal class is
Question 10 :
Consider the following distribution :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b19b72273b2305849799a6.jpg' />
The frequency of the class 30-40 is