Question

A “fun size” of a Snickers bar is supposed to weigh 20 grams. Because the selling candy bars under their advertised weight is severe, the manufacturer calibrates the machine so the mean weight is 20.1 grams. The quality-control engineer at the M& M-Mars, the Snickers manufacturer, is concerned about calibration. He obtains a random sample of 11 candy bars, weighs them and, obtains the data shown below:

19.68 20.66 19.56 19.98 20.65 19.61

20.55 20.36 21.02 21.50 19.74

(a) H0 :

(b) Ha :

(c) Test Statistic:

(d) Decision:

(e) Conclusion:

(f) Compute a 95% confidence interval for population mean µ. Interpret your result.

Answer 1