CASE STUDY QUESTION 8-Class X-Maths

CASE STUDY QUESTION 8-Class X-Maths

Overweight and obesity may increase the risk of many health problems, including diabetes, heart disease, and certain cancers. The basic reason behind is the laziness, eating more junk foods and less physical exercise. The school management give instruction to the school to collect the weight data of each student. During medical check of 35 students from Class X- A, there weight was recorded as follows:

(a) Find the median class of the given data.
(i) 44-46 (ii) 46-48 (iii) 48-50 (iv) None of these

Ans:

(b) Calculate the median weight of the given data.
(i) 46.5 (ii) 47.5 (iii) 46 (iv) 47

Ans:

(c) Find the mean of the given data.
(i) 45 (ii) 45.8 (iii) 46.2 (iv) 46.8

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(d) Find the modal class of the given data.
(i) 44-46 (ii) 46-48 (iii) 48-50 (iv) 50-52

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(e) While computing the mean of grouped data, we assumed that the frequencies are
(i) evenly distributed over all the classes
(ii) centred at the class marks of the classes
(iii) centred at the upper limits of the classes
(iv) centred at the lower limits of the classes

Ans: While computing mean of grouped data, we assume that the frequencies are centred at the class marks of the classes.