Calcium Arecent study examined the effect of diet cola consumption on calcium levels in women. A sample of 16 healthy women aged 18 to 40 were randomly assigned to drink 24 ounces of either diet cola or water. Their urine was collected for three hours after ingestion of the beverage and calcium excretion (in mg) was measured. The researchers were investigating whether diet cola leaches calcium out of the system, which would increase the amount of calcium in the urine for diet cola drinkers. The data are given in Table B.2 and stored in ColaCalcium.

Table B.2

(a) Using StatKey or other technology, carry out an appropriate inference procedure to address the question of whether or not the mean amount of calcium lost for women who drink diet cola is more than for women who drink water.
(b) If the analysis in part (a) indicates that the results are significant, construct a 95% confidence interval to estimate the size of the effect. If the results in part (a) are not significant, combine the data into one sample of 16 values and use it to construct a 95% confidence interval for the average amount of calcium excreted. Be sure to interpret whichever interval you construct.

Transcribed Image Text:

Diet cola 50 58 61 62 48 55 58 56 Water 45 53 48 46 54 53 46 48