Answer to Question #227277 in Programming & Computer Science for R man

Question

The four branches of a bakery in new York made sales(in millions us dollars). As shown below

A 1.13 1.71 1.39 1.68 1.74 1.19 1.15 1.36

B 1.34 1.47 1.74 1.53 1.74 1.19 1.15 1.36

C 1.15 1.33 1.01 1.28 1.20 1.59 1.59 1.68

D 1.03 1.68 1.78 1.51 1.23 1.91 1.34 1.82

Write a well commented program in R that uses the data to compute the following parameter estimates

a) CS =(( (n₁-1)s²₁ +(n₂-1)s₂² +(n₃-1)s²₃ +(n₄-1)s²₄)/(n₁+n₂+n₃+n₄-4))^1/2

b)CM= (n₁x₁+n₂x₂+n₃x₃+n₄x₄)/(n₁+n₂+n₃+n₄)

where

n_i =sample size for the i^th branch

x_i =sample mean for the i^th branch

s²_i=sample variance for the i^th branch

i=1,2,3,4

Answer 1

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