10th Maths Chapter 8 Statistics and Probability Exercise 8.2
10th Standard Maths Chapter 8 Statistics and Probability Exercise 8.2 Guide. TN SSLC Samacheer Kalvi Guide Chapter 8 Exercise 8.2 Book Back Answers & Solutions. 10th All Subject Guide – Click Here. Class 1 to 12 All Subject Book Back Answers – Click Here.
1. The standard deviation and coefficient of variation of data are 1.2 and 25.6 respectively. Find the value of the mean.
Solution:
Co-efficient of variation C.V. = \(\mathrm{C.V}=\frac{\sigma}{\overline{x}} \times 100\)
2. The standard deviation and coefficient of variation of data are 1.2 and 25.6 respectively. Find the value of the mean.
Solution:
3. If the mean and coefficient of variation of data are 15 and 48 respectively, then find the value of standard deviation.
Solution:
4.If n = 5 , \(\overline{x}\) = 6, \(\Sigma x^{2}\) = 765, then calculate the coefficient of variation.
Solution:
5. Find the coefficient of variation of 24, 26, 33, 37, 29,31.
Solution:
6. The time taken (in minutes) to complete homework by 8 students in a day is given by 38, 40, 47, 44, 46, 43, 49, and 53. Find the coefficient of variation.
Solution:
7. The total marks scored by two students Sathya and Vidhya in the 5 subjects are 460 and 480 with a standard deviation of 4.6 and 2.4 respectively. Who is more consistent in performance?
Solution:
8. The mean and standard deviation of marks obtained by 40 students of a class in three subjects Mathematics, Science, and Social Science are given below.
Which of the three subjects shows the highest variation and which shows the lowest variation in marks?
Solution:
Science subject shows the highest variation. Social science shows the lowest variation.
9. The temperature of two cities A and B in the winter season are given below.
Find which city is more consistent in temperature changes?
Solution:
∴ Co-efficient of variation of City A is less than the C.V of City B.
∴ City A is more consistent.
