According to “Dietary Goals for the United States (1997)”, high sodium intake may be related to ulcers, stomach cancer, and migraine headaches. The human requirement for salt is only 220 milligram per day, which is surpassed in most single servings of ready-to-eat cereals. If a random sample of 20 similar servings of Special K has a mean sodium content of 244 milligrams and a standard deviation 24,5 milligrams does this suggest at 0,05 level of significance that the average sodium content for single servings of Special K is greater than 220 milligrams? Assume the distribution of sodium content to be normal. State the null and alternative hypothesis.

Answer 1

Null hypothesis (H0): The average sodium content for single servings of Special K is not greater than 220 milligrams.

Alternative hypothesis (H1): The average sodium content for single servings of Special K is greater than 220 milligrams.