Acoustomagnetic surveillance antitheft portals (the kind used to prevent shoplifting) temporarily affected the pacemakers in 48 out of 50 subjects tested. (a) Construct a 90 percent confidence...

Acoustomagnetic surveillance antitheft portals (the kind used to prevent shoplifting) temporarily affected the pacemakers in 48 out of 50 subjects tested. (a) Construct a 90 percent confidence interval for the proportion of all subjects whose pacemakers would be affected. (b) Check the normality assumption. *(c) Use MINITAB to estimate a confidence interval without assuming normality. (Data are from Science News 154, no. 19, p. 294.)