Evaluate hypethesis about data normality using diagrams For

Evaluate hypethesis about data normality, using diagrams For the given data, evaluate shape of the distribution, state the hypothesis about probability distribution, validate the hypotheisis using diagrams State the hypothesis about distribution of the data from p.1 ans validate it using probability plot

Solution

3.

x=c(28.1,29.5,26.7,25.9, 24.6,25.7, 27.5, 26.9, 28.9, 27.2 , 25, 27.1, 27, 27.1,
    28.4, 28.6, 26.6, 30, 25.9, 25.2, 26.6, 26.7, 25.8, 26.4, 25.3, 27.8, 26.9,
     23.4, 27.1,32,27.1)
par(mfrow=c(1,2))
h=hist(x)
z=plot(x, main=\"scatter\")

w=lag.plot(x, main=\"lag-plot\")
n=qqnorm(x)

4.

x=c(27.9,31.4,25.1,28.7,29.1,29.2,25.4,28,26.2,31,28,23.8,31.8,29.8,
    31,32,31.5,26.5,29.5,28.3,29.2,27.2,25.3,28.5,24.1,28.3,27.3,31.5,31.9)
par(mfrow=c(1,2))
h=hist(x)
n=qqnorm(x)