ECO-7 Solved Assignment Hindi medium 2023-24

Description

ECO-7 Solved Assignment Hindi medium 2023-24 for July 203 and January 2024 Session

TUTOR MARKED ASSIGNMENT
Course Code : ECO-07
Course Title : ELEMENTS OF STATISTICS
Assignment Code : ECO-07/TMA/2024
Coverage : ALL BLOCKS
Maximum Marks: 100
Attempt all the questions:
Q.1 a) Calculate the standard deviation and variance from the following data:
x 10 12 14 16 18 20 22
f 3 5 9 16 8 7 2
b) What is coefficient of variation? What is its role as a measure of variation? (10+10)
Q.2 What is sampling? Explain various methods of sampling? Why sample survey is preferred compared to census survey? Explain. (20)
Q.3 Describe the problems that are usually confronted by the investigator when he decides to collect primary data. Explain various methods of collecting primary data and also narrate their merits and demerits.
Q.4 a) A motorist travelled for three days at the rate of 480 km. a day. On the first day he travelled for 10 hours at a speed of 48 km per hour, on the second day he travelled for 12 hours at a speed of 40 km. per hour and on the third day for 15 hours at a speed of 32 km. per hour. What was his average speed?
b) Calculate the arithmetic mean for the following data by using the two methods of Arithmetic mean for Discrete Series:
Marks 10 20 30 40 50 60 70 80
No. of students 8 21 23 17 15 9 5 2
Q.5 Write short notes on the following:
a) Median
b) Negative skewness
c) Sampling errors
d) Objectives of classification

ECO7, BCO 7