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In: Statistics and Probability

The recommended dietary allowance​ (RDA) of iron for adult females is 18 milligrams​ (mg) per day....

The recommended dietary allowance​ (RDA) of iron for adult females is 18 milligrams​ (mg) per day. The given iron intakes​ (mg) were obtained for 45 random adult females. At the 10​% significance​ level, do the data suggest that adult females​ are, on​ average, getting less than the RDA of 18 mg of​ iron? Assume that the population standard deviation is

4.7 mg. Preliminary data analyses indicate that applying the​ z-test is reasonable.​ (Note: =14.79 ​mg.)

could you please go into detail with finding the test statistic? I use the correct formula but i get a completely different number every time.

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orchestra answered 2 years ago
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