Curing diabetes: Vertical banded gastroplasty is a surgical procedure that reduces the volume of the stomach in order to produce weight loss. In a recent study,

82

patients with Type

2

diabetes underwent this procedure, and

59

of them experienced a recovery from diabetes. Does this study provide convincing evidence that less than

73%

of those with diabetes who undergo this surgery will recover from diabetes? Use the

=0.05

level of significance with the

P

-value method and Excel.