Calcium is the most abundant mineral in the body and also one of the most important.
The recommended daily allowance (RDA) of calcium for adults is 800 milligrams (mg).
A random sample of 18 people with incomes below the poverty level gives the following
daily calcium intakes:
686, 433, 743, 647, 734, 641, 993, 620, 574, 634, 850, 858, 992, 775, 1113, 672, 879, 609
At the 1% significance level, do the data provides sufficient evidence to conclude that the
mean calcium intake of all people with income levels below the poverty level is less than
the RDA of 800 mg?
Step 1 :
Step 2:
3.Critical Value approach:
4.Conclusion: