A random sample of 322 medical doctors showed that 170 had a solo practice.

(a) Let p represent the proportion of all medical doctors who have a solo practice. Find a point estimate for p. (Use 3 decimal places.)

(b) Find a 90% confidence interval for p. (Use 3 decimal places.)

lower limit

upper limit

Give a brief explanation of the meaning of the interval.

10% of the confidence intervals created using this method would include the true proportion of physicians with solo practices.

90% of the all confidence intervals would include the true proportion of physicians with solo practices.

90% of the confidence intervals created using this method would include the true proportion of physicians with solo practices.

10% of the all confidence intervals would include the true proportion of physicians with solo practices.

(c) As a news writer, how would you report the survey results regarding the percentage of medical doctors in solo practice?

Report p.

Report p along with the margin of error.

Report the confidence interval.

Report the margin of error.