3. A large automobile manufacturing plant produces 1200 new cars every day. A quality-control inspector checks a random sample of 90 cars from one day's production and finds that 12 of them have minor paint flaws. a. Find the margin of error for a 99% confidence interval. b. Construct and interpret a 99% confidence interval by completing the statement below. We are |% confident that the true population proportion for the cars with minor paint flaws are between and c. Find the margin of error for a 90% confidence interval.

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PART D !

3. A large automobile manufacturing plant produces 1200 new cars every day. A quality-control inspector checks
a random sample of 90 cars from one day's production and finds that 12 of them have minor paint flaws.
a. Find the margin of error for a 99% confidence interval.
b. Construct and interpret a 99% confidence interval by completing the statement below.
We are
_% confident that the true population proportion for the cars
with minor paint flaws are between
and
c. Find the margin of error for a 90% confidence interval.
d. Construct and interpret a 90% confidence interval by completing the statement below.
We are
% confident that the true population proportion for the cars
with minor paint flaws are between
and
e. A 99% confidence interval is
than a 90% confidence interval.
Transcribed Image Text:3. A large automobile manufacturing plant produces 1200 new cars every day. A quality-control inspector checks a random sample of 90 cars from one day's production and finds that 12 of them have minor paint flaws. a. Find the margin of error for a 99% confidence interval. b. Construct and interpret a 99% confidence interval by completing the statement below. We are _% confident that the true population proportion for the cars with minor paint flaws are between and c. Find the margin of error for a 90% confidence interval. d. Construct and interpret a 90% confidence interval by completing the statement below. We are % confident that the true population proportion for the cars with minor paint flaws are between and e. A 99% confidence interval is than a 90% confidence interval.
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