Question

To receive full credit on the confidence intervals, you must show each of the following: a. The critical value (3 points) b. The margin of error (round answers to at least hundredths) (3 points) c. The minimum and maximum numbers of the interval (3 points each) To receive full credit on the interpretations, you must include information about the specific problem. When finding the sample size, remember to round all answers up to the next highest whole number Show all work for partial credit!

Answer 1

175 X sample size 356.0 n sample proportion p x/n= 0.4916 (p*(1-p)/n) std error 0.0265 =Se for 98 % Cl value of 26 margin of error E-z*std error lower confidence bound-sample proportion-margin of error Upper confidence bound-sample proportion+margin of error 0.062 0.430 0.553

a)

point estimate =0.4916

b)

98% confidence interval for p =0.430 , 0.553
c)

above interval gives 98% confidence to contain true population proportion of all medical doctors with a solo practice.