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# STA-301 Solution of Assignment No. 2...Learn Statistics Concepts With Me

STA-301 Solution of Assignment No. 2...Learn Statistics Concepts With Me

Assignment No: 2 (Lessons 10-15)

Question 1:                                                                                                                           Marks: 7

For the given cumulative frequency table of students of different age groups, calculate the coefficient of standard deviation and coefficient of variation.

 Age in years Cumulative frequency of students (cf) 5-8 3 9-12 15 13-16 24 17-20 51 21-24 57 25-28 60

Question 2:                                                                                                                           Marks: 8

From the following data of hours worked in a factory (x) and output units (y), determine the regression line of y on x, the linear correlation coefficient and interpret the result of correlation coefficient.

 Hours (X) 91 102 83 93 89 72 82 85 79 Production (Y) 300 302 315 330 300 250 300 340 315

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### Replies to This Discussion

Lets Take Initiative to finish copy paste culture and develop the culture of Learning and Research.....Proud to be Virtualian

kamal kar dita pa g what a thought

yeah thats the true learning great well done boy

SD ka jo formula handout page86 me given he wo kyu nai use kia? plz tell

m so cnfuse

dear SD hamesha variance k sqaure root k brabar hota hay apko itni detail calcultaions ki zarorat nhi dono se answer same ay ga dono hi thek hain

u mean they both r same which r mentioned in handout page num 86....actual n the short cut....

Hi this is good from u

but in 2nd question me little confused at the end

Linear Coefficient of Correlation:

R = n∑xy – (∑x)(∑y) / [n∑x2 – (∑x)2] [ n∑y2 – (∑y)2]

9 (238024) – (776)(2752) / [9(67518) – (776)2] [9(846654) – (2752)2]

2142216 – 2135552 / (607662 – 602176) (7619886 – 7573504)

6664 / (5486) (46382)

PLease guide me as soon as possible.

thnx

very good, thanks

mmmm this step is really superb:)

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