Question

In a study of the accuracy of fast food drive-through orders, Restaurant A had 315 accurate orders and 62 that were not accurate. a. Construct a 90% confidence interval estimate of the percentage of orders that are not accurate. b. Compare the results from part (a) to this 90% confidence interval for the percentage of orders that are not accurate at Restaurant B: 0.148 less than p less than 0.215. What do you conclude?

a. Construct a 90% confidence interval. Express the percentages in decimal form.

Answer #1

Total number of orders 315+62=377

Hence the proportion of not accurate orders is

The confidence interval for the population proportion is given by

For 90% confidence interval also n=292

Hence the interval is

Hence 0.1331<p<0.1959

(13.31%,19.59%) is 90% confidence interval.

b) given 0.148 <p <215.

for restaurant B

0.1331<p<0.1959 for restaurant A

by looking the confidence interval we conclude that the confidence interval for restaurant A is wider than the confidence interval for restaurant B

In a study of the accuracy of fast food drive-through orders,
Restaurant A had 304 accurate orders and
72 that were not accurate. a. Construct a 90%
confidence interval estimate of the percentage of orders that are
not accurate. b. Compare the results from part
(a) to this
90% confidence interval for the percentage of orders that are
not accurate at Restaurant B: 0.1730.173less than<pless
than<0.2470.247. What do you conclude?
Express the percentages in decimal form.

In a study of the accuracy of fast food drive-through orders,
Restaurant A had 245 accurate orders and 71 that were not accurate.
a.) Construct a 90% confidence interval estimate of the percentage
of orders that are not accurate. b.) Compare the results from part
(a) to this 90% confidence interval for the percentage of orders
that are not accurate at Restaurant B: 0.204< p < 0.288.
What do you conclude?
a) Construct a 90% confidence interval. Express the percentages...

In a study of the accuracy of fast food drive-through orders,
Restaurant A had 296 accurate orders and66 that were not
accurate.
a. Construct a 90% confidence interval estimate of the
percentage of orders that are not accurate. Express the percentages
in decimal form.
b. Compare the results from part (a) to this 90 % confidence
interval for the percentage of orders that are not accurate at
Restaurant B:0.165 <p <0.237 What do you conclude?

In a study of the accuracy of fast food drive-through orders,
Restaurant A had 260 accurate orders and 74 that were not accurate.
a. Construct a 95% confidence interval estimate of the percentage
of orders that are not accurate. b. Compare the results from part
(a) to this 95% confidence interval for the percentage of orders
that are not accurate at Restaurant B: 0.198 < p < 0.295.
What do you conclude? a. Construct a 95% confidence interval.
Express the...

In a study of the accuracy of fast food drive-through orders,
Restaurant A had 332 accurate orders and 58 that were not accurate.
a. Construct a 95% confidence interval estimate of the percentage
of orders that are not accurate. b. Compare the results from part
(a) to this 95% confidence interval for the percentage of orders
that are not accurate at Restaurant B: 0.126less thanpless
than0.206. What do you conclude? a. Construct a 95% confidence
interval. Express the percentages in...

In a study of the accuracy of fast food drive-through orders,
Restaurant A had 270 accurate orders and 64 that were not
accurate.a. Construct a 95%confidence interval estimate of the
percentage of orders that are not accurate.b. Compare the results
from part (a) to this 95% confidence interval for the percentage
of orders that are not accurate at Restaurant B:
0.165<p<0.259 What do you conclude?
a. Construct a 95% confidence interval. Express the percentages
in decimal form.

In a study of the accuracy of fast food drive-through orders,
Restaurant A had 238 accurate orders and 58 that were not accurate.
a. Construct a 90% confidence interval estimate of the percentage
of orders that are not accurate. b. Compare the results from part
(a) to this 90% confidence interval for the percentage of orders
that are not accurate at Restaurant B: 0.174 less than p less than
0.259. What do you conclude?

In a study of the accuracy of fast food drive-through orders,
Restaurant A had
267
accurate orders and
72
that were not accurate.
a. Construct a
90%
confidence interval estimate of the percentage of orders that
are not accurate.
b. Compare the results from part (a) to this
90%
confidence interval for the percentage of orders that are not
accurate at Restaurant B:
0.1950 <0.262
What do you conclude?

In a study of the accuracy of fast food drive-through orders,
Restaurant A had 210 accurate orders and 67 that were not
accurate.
a. Construct a 90% confidence interval estimate of the
percentage of orders that are not accurate.
b. Compare the results from part (a) to this 90% confidence
interval for the percentage of orders that are not accurate at
Restaurant B: 0.222 <p< 0.307. What do you conclude?

In a study of the accuracy of fast food drive-through orders,
Restaurant A had 279 accurate orders and 62 that were not
accurate.
a. Construct a 90% confidence interval estimate of the
percentage of orders that are not accurate.
b. Compare the results from part (a) to this 90%
confidence interval for the percentage of orders that are not
accurate at Restaurant B:
0.161 <p than<0.234. What do you
conclude?
a. Construct a 90% confidence interval. Express the
percentages in decimal...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 32 minutes ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 4 hours ago

asked 4 hours ago

asked 5 hours ago

asked 5 hours ago