A distributor for health products claims that his vitamin pills can help women achieve their desired weight of 49kg. An experiment was carried out to test his claim. 80 women were randomly chosen and took the vitamin pill for a period of time. The weight, x, of 80 women were then taken and recorded in kg.

Test at 4% significance level whether the distributor was understating his claim.

Question

A distributor for health products claims that his vitamin pills can help women achieve their desired weight of 49kg. An experiment was carried out to test his claim. 80 women were randomly chosen and took the vitamin pill for a period of time. The weight, x, of 80 women were then taken and recorded in kg.

Test at 4% significance level whether the distributor was understating his claim.

anonymous · Answer

For understating his claim, should H1<49 or H1>49 ?