G12.6

Histidine excretion. Exercise 12.4 introduced data in which 24-hour histidine excretion was compared in men and women on protein-restricted diets. Table 12.11 lists mean and standard deviations from this dataset.

1. Calculate the standard error of the mean difference without assuming equal variances.
2. A computer program calculatesfor these data. Based on this df, calculate a 95% confidence interval for mu1-mu2.

Carry out a hypothesis test of whether mean histidine excretion differs between men and women on protein-restricted diets.