The following data relate to sales and expenses of
10 firms. Calculate coefficient of correlation:
Sales 50 50 55 60 65 65 65 60 60 50
(in Rs. 000)
Expenses 11 13 14 16 16 15 15 14 13 13
Answers
Answer:
11,12,13,14,15,15,16,17,18,19,29
Answer:
Correlation = 1.2
Step-by-step explanation:
x y xy x² y²
50 11 550 2500 121
50 13 650 2500 169
55 14 770 3025 196
60 16 960 3600 256
65 16 1040 4225 256
65 15 975 4225 225
65 15 975 4225 225
60 14 840 3600 256
60 13 780 3600 169
50 13 650 2500 168
580 140 8190 34000 2042
r = €xy-€x€y
√[n€x²-(€x)²][n€y²-(€y)²
€ - nothing but sum of (there is no symbol in my system to upload)
= 10(8190)-(580)(140)
√[10(34000)-(580)²][10(2042)-(140)²
= 81900-81200
√(340000-336400)(20420-19600)
= 700
√3600×820
= 700/543.32
= 1 .2