describing store to stora va ability n the price of particular brand offreezer.

Question

describing store to stora va ability n the price of particular brand offreezer. A quantity des gned to give a relative measure o var ao lit s the coe ficent of ans on. Denoted by CV the coeffic ent of vana uon e presses e standard e a o percentage or he men It is defined y th or mud cv 100).Conider tso samples. Sample 1 gives the actual wcight in ounocs) of the contents of cant of pet food labaled at having a net weipht of 8 oz. Sample 2 aives the actual wcight in pounds) of thc contents of bags of dry pet food labcled s having a nct weight of s0 lb. Thare arc waights for tha two samples. 50.4 50.348.7 48.2 (a) For each of the given samples, calculate the meen and the standard deviaion. (Round all intermediate calouiations and answers to five deimal plaves.) For sample 1 Hean Standard cleviation For samplc 2 Standard daiation tb) Compute the coetficient of variation for each sample.(Round all answers to two decimal places.) Cis

Explanation / Answer

used R

sample1 <- c(7.4,6.7,6.4,7.7,6.4,7.4,7.8,6.7,6.7,5.3)
> sample2 <- c(52.6,51.4,51.5,51.7,52.6,47,50.4,50.3,48.7,48.2)
> mean(sample1)
6.85
> sd(sample1)
0.7531416
> mean(sample2)
50.44
> sd(sample2)
1.910904

SolutionA:

For sample1

mean=6.85

sd=0.75314

For sample2:

mean=50.44

sd=1.91090

solutionb:

CV1:=100(s/xbar)

=100(0.75314/6.85)

=10.99%

CV2=100(1.91090/50.44)

=3.79%

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