Question: A study (B. Kristensen et al., J. Intern. Med., 232: 237-245 (1992)) con- sidered the effect of prednisolone on severe hypercalcaemia in women with metastatic

A study (B. Kristensen et al., J. Intern. Med., 232: 237-245 (1992)) con- sidered the effect of prednisolone on severe hypercalcaemia in women with metastatic breast cancer. Of 30 patients, 15 were randomly selected to re- ceive prednisolone, and the other 15 formed a control group. Seven of the 15 prednisolone-treated patients achieved normalization in their level of serum- ionized calcium. This happened for none of the 15 patients in the control group. Use Fisher's exact test to find a P-value for testing whether results were significantly better for treatment than control. Interpret.

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