Nutritional requirement of daily allowance for iron for females under the age of 51 is 18 mg. A sample was conducted during a 24-hour period from 45 randomly selected females under the age of 51. For this study the sample mean is 14.68 mg with a standard deviation of 4.2 mg. At the 1 percent significance level are females under the age of 51 getting less than the recommended daily allowance of 18 mg of iron?