Case Study Questions for Class 10 Maths Chapter 14 Statistics

Question 1:

Direct income in India was drastically impacted due to the COVID-19 lockdown. Most of the companies decided to bring down the salaries of the employees upto 50%.

The following table shows the salaries (in percent) received by 50 employees during lockdown.

Based on the above information, answer the following questions.

(i) Total number of persons whose salary is reduced by more than 20% is (a) 40 (b) 46 (c) 30 (d) 22

(ii) Total number of persons whose salary is reduced by atmost 40% is (a) 32 (b) 40 (c) 46 (d) 18

(iii) The modal class is (a) 50-60 (b) 60-70 (c) 70-80 (d) 80-90

(iv) The median class of the given data is (a) 50-60 (b) 60-70 (c) 70-80 (d) 80-90

(v) The empirical relationship among mean, median and mode is (a) 3 Median = Mode +2 Mean (b) 3 Median = Mode −2 Mean (c) Median = 3 Mode −2 Mean (d) Median =3 Mode +2 Mean