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 1% 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 4.4 mg. Preliminary data analyses indicate that applying the z-test is reasonable. (Note: x= 14.71 mg.) Click here to view the iron intake data, Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve.

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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 1% 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 4.4 mg. Preliminary data analyses indicate that applying the z-test is reasonable. (Note: x = 14.71 mg.)
Click here to view the iron intake data.
Click here to view Page 1 of the table of areas under the standard normal curve.
Click here to view Page 2 of the table of areas under the standard normal curve.
Transcribed Image Text: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 1% 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 4.4 mg. Preliminary data analyses indicate that applying the z-test is reasonable. (Note: x = 14.71 mg.) Click here to view the iron intake data. Click here to view Page 1 of the table of areas under the standard normal curve. Click here to view Page 2 of the table of areas under the standard normal curve.
Determine the P-value.
P=D
(Round to three decimal places as needed.)
the null hypothesis. At the 10% significance level, the data
sufficient evidence to conclude that
adult females are
the RDA of iron, on average.
Transcribed Image Text:Determine the P-value. P=D (Round to three decimal places as needed.) the null hypothesis. At the 10% significance level, the data sufficient evidence to conclude that adult females are the RDA of iron, on average.
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