In: Statistics and Probability
For these problems, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.
In a random sample of 63 professional actors, it was found that 39 were extroverts.
(a) Let p represent the proportion of all actors who are extroverts. Find a point estimate for p. (Round your answer to four decimal places.)
.6190
(b) Find a 95% confidence interval for p. (Round your answers to two decimal places.)
Lower Limit:
Upper Limit:
In a random sample of 538 judges, it was found that 279 were introverts.
(a) Let p represent the proportion of all judges who
are introverts. Find a point estimate for p. (Round your
answer to four decimal places.)
.5186
(b) Find a 99% confidence interval for p. (Round
your answers to two decimal places.)
Lower Limit:
Upper Limit:
A random sample of 5320 permanent dwellings on an entire reservation showed that 1683 were traditional hogans.
(a) Let p be the proportion of all permanent dwellings on the entire reservation that are traditional hogans. Find a point estimate for p. (Round your answer to four decimal places.)
.3164
(b) Find a 99% confidence interval for p. (Round your answer to three decimal places.)
Lower Limit:
Upper Limit: