Hypothesis Test by Hand
17. On bottles of a popular cola it is advertised that the bottle contains 300 milliliters of cola. A skeptic
who normally purchases the cola at a discount store suspects that the bottles are under filled so the
person measures the contents of sixteen bottles that were recently purchased.
Data Summary: n =16, Mean = 299.03 ml, Standard Deviation = 1.50 ml
Is there convincing evidence that the mean contents of cola bottles is less than the advertised
amount?