1. Quality Assurance. A company that produces food uses a machine to package 454 grams of bags of potato ships. A random sample of 15 bags of potato ships has the following net weights, in grams: 465...

1. Quality Assurance. A company that produces food uses a machine to package 454 grams of bags of potato ships. A random sample of 15 bags of potato ships has the following net weights, in grams:

465  456  438   454    447   449    442   449   446   447

468  433  454  463. and 450

Does the data provides sufficient evidence to conclude that the packaging machine is not working properly? perform a hypothesis test at the 5% significance level.

a) State null and alternative hypothesis

b) Find test statistics

c) Find critical value

d) Conclusion