Question
In: Statistics and Probability
Fast Food Drive-Thru Accuracy If two orders are selected, find the probability that they are both from Wendy’s.
Use the data in the following table, which lists drive-thru order accuracy at popular fast food chains (data from a QSR Drive-Thru Study). Assume that orders are randomly selected from those included in the table.
McDonald's | Burger King | Wendy's | Taco Bell | |
Order Accurate | 329 | 264 | 249 | 145 |
Order Not Accurate | 33 | 54 | 31 | 13 |
Fast Food Drive-Thru Accuracy If two orders are selected, find the probability that they are both from Wendy’s.
Assume that the selections are made with replacement. Are the events independent?
If 2 orders are placed without replacement, what is the probability that all orders are from Wendy’s?
Assume that the selections are made without replacement. Are the events independent?
If one order is selected, find the probability of getting an order from McDonald’s or Wendy’s or an order that IS NOT accurate.
Solutions
Expert Solution
The 2 way table is:
| Order Accurate | 329 | 264 | 249 | 145 | 987 |
| Order Not Accurate | 33 | 54 | 31 | 13 | 131 |
| 362 | 318 | 280 | 158 | 1118 |
Assume that the selections are made with replacement. Are the events independent?
318/1118 * 318/1118 = 0.0809
Yes, the events are independent
If 2 orders are placed without replacement, what is the probability that all orders are from Wendy’s?
318/1118 * 317/1117 = 0.0807
No, the events are not independent
Assume that the selections are made without replacement. Are the events independent?
No, the events are not independent
If one order is selected, find the probability of getting an order from McDonald’s or Wendy’s or an order that IS NOT accurate.
329/1118 + 264/1118 + 131/1118 = 0.6476
orchestra answered 2 years agoRelated Solutions
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In a study of fast
food accuracy on drive-thru orders, Burger King had 264 accurate
orders and 54 that were not accurate.
a) Construct a 95% CI
for the percentage of orders that are not accurate.
b) A similar survey at
Wendy's yielded a 95% CI of inaccurate orders of 6.2% < p <
15.9%. Comparing the two results, what do you find?
In a study of fast food accuracy on drive-thru orders, Burger King had 264 accurate orders...
In a study of fast food accuracy on drive-thru orders, Burger
King had 264 accurate orders and 54 that were not accurate.
a. Construct a 95% CI for the percentage of orders that are not
accurate.
b. A similar survey at McDonald's yield a 95% CI of inaccurate
orders of 6.2%<P<15.9%. Comparing the two results, what do
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Express the percentages in decimal form.
------------- <p<-------------
(Round to three decimal places as needed.)
b. Compare the results from part (a) to this
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or 99% (calculate the...
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In a study of the accuracy of fast food drive-through orders, one restaurant had 39 orders...
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In a study of the accuracy of fast food drive-through orders, one restaurant had 33 orders...
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33
orders that were not accurate among
384
orders observed. Use a
0.10
significance level to test the claim that the rate of inaccurate
orders is equal to 10%. Does the accuracy rate appear to be
acceptable?
Identify the test statistic and the P value.
In a study of the accuracy of fast food drive-through orders, one restaurant had 39 orders...
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