Example # $4$:

Table $1$ shows a list of the densities at $28$ days from the results of $40$ concrete cube test records conducted in at specific structural Lab.

Let us assume that the distribution of the concrete densities given in Table $1$ follows a normal distribution. Use Chi$-$Square test to verify the hypothesis, using the estimated mean and standard deviation of $2445$ and $15\mathrm{.}99k\frac{g}{m}3$ for the concrete densities. $[$Use $5\%$ level of significance$].$

Table $1$: Ordered data of density and compressive strength of concrete

$\backslash$table$[[$Order$,1,2,3,4,5,6,7,8,9,10],[\backslash$table$[[$Density$],[(k\frac{g}{m}3)$