## ECO – 07 : ELEMENTS OF STATISTICS

Bachelor’s Degree Programme – BDP Solved Assignments for July 2017 and January 2018 Admission Cycles

BDP Tutor Marked Solved Assignment

Course Code : ECO – 07
Course Title : Elements of Statistics
Assignment Code : ECO-07/TMA/2017-18
Coverage : All Blocks

Elective Course in Commerce
ECO – 07 : Elements of Statistics Solved Assignment for 2017-18

Following are the questions of Elective Course in Commerce ECO-07 : ELEMENTS OF STATISTICS of IGNOU – B.COM Assignment. To download answers of all the questions of this assignment in Hindi or English click on the question, you can view or download the answer there.

Question 1. What is statistical sampling and explain various methods of sampling.

Question 2. “Statistical methods are most dangerous in the hands of the inexpert” Discuss with example.

Question 3. (a) Find out missing frequencies in the following incomplete distribution:

 Measurement 0-10 10-20 20-30 30-40 40-50 Frequency 3 ? 20 12 ?

Question 4.(a) Karl Pearson‟s coefficient of skewness of a distribution is +0.32. Its standard deviation is 6.5 and mean is 29.6. Find the mode and median of the distribution.

(b) The mean and standar deviation of a set of 100 observations were worked out as 40 and 5 respectively by a computer who by mistake took the value 5o in place of 40 for one observation. Recalculate the correct mean and variance.

(c) Find the missing information from the following:

 Particulars Group I Group II Group III Combined Number 50 ? 90 200 Standard Deviation 6 7 ? 7.746 Mean 113 ? 115 116

Question 5. Write short notes on the following:

a) Dispersion

b) Mean deviation

c) Standard deviation

d) Lorenz Curve 