Consider the following distributions of the marks scored by 100 students in a quantitative
techniques activity. The median mark is known and given as 49.8.
Marks 0- 15 15- 30 30- 45 45- 60 60- 75 75 – 90 90-105 Total
No. of Students 10 12 20 f1 15 f2 8 100
Find the missing frequencies f1 and f2 and then compute the coefficient of variation and
comment.
b) Fit a linear trend curve by the least-squares method to the following data and determine
trend values and the find levels of production in 2012 and 2018
Year 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
Production
(Kg.)
30 50 60 60 80 100 110 120 130 150
1 answer