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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

 

 Solution with concepts


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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

If anybody have ambiguity about stat then can ask freely 

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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