n a mechanical testing lab, Plexiglas strips are stretched to failure. Let X equal the
change in the length in mm before breaking. Assume that the distribution of X is
(,
2
). Test the null hypothesis 0: = 5.70 against the alternative hypothesis
1: > 5.70, using following observations of X. 5.71 5.80 6.03 5.87 6.22 5.92 5.57
5.83. Calculate the value of the test statistic and also clearly state your conclusion.
3. Describe the method to obtain the sample size. Explain any two methods to select
random samples from a finite population; also explain under which situations these
methods are used.Verify the results for above using R