It is believed that the lower than normal level of human calcitonin (HCT) in men with rheumatoid arthritis is a risk factor in developing osteoporosis. In 43 men 1. with rheumatoid arthritis, the...

It is believed that the lower than normal level of human calcitonin (HCT) in men with rheumatoid arthritis is a risk factor in developing osteoporosis. In 43 men 1. with rheumatoid arthritis, the observed HCT mean was 33.8pg/mL with a standard deviation of 23.6. In normal healthy men, the mean was 47.9pg/MIl. From the sample information, can we conclude that the HCT mean in men with rheumatoid arthritis is less than that in normal men? Assume a significance level of 0.05.