Figure 9 shows a histogram for a random sample of n = 264 women (drawn from the same NHANES III study used for the sample of men in Figure 6). The mean of these data is x = 59.6 grams and the standard deviation is s = 30.5 grams. Estimate the population mean and give a 95% confidence interval. Comment on how these values compare to the recommended daily allowance (RDA) for women of 45–50 grams.

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Frequency 20 % 40 60 120 100 n = 264 women 80 T 30 60 90 120 150 180 210 Protein intake for women (grams) Figure 9