Question
In: Statistics and Probability
The mean waiting time at the drive-through of a fast-food restaurant from the time an order...
The mean waiting time at the drive-through of a fast-food restaurant from the time an order is placed to the time the order is received is 84.3 seconds. A manager devises a new drive-through system that he believes will decrease wait time. He collected a sample of 10 and got a mean of 71.52 seconds and a sample standard deviation of 27.16. Conduct a hypothesis test at α=0.01 to test the manager's claim. State the hypotheses, test statistics, critical value, decision + conclusion.
Following the previous problem. Calculate the 99% confidence interval for the population mean waiting time of the new system. (round to 2 decimal places)
Solutions
Expert Solution
Conclusion: There is no evidence that new drive-through system decreased wait time.
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orchestra answered 2 years agoRelated Solutions
The mean waiting time at the drive-through of a fast-food restaurant from the time an order...
The mean waiting time at the drive-through of a fast-food
restaurant from the time an order is placed to the time the order
is received is 84.3 seconds. A manager devises a new drive-through
system that he believes will decrease wait time. He initiates the
new system at his restaurant and measures the wait time for eleven
randomly selected orders. The wait times are provided in the table
below. Based on the given data, is the new system effective? Use...
The mean waiting time at the drive-through of a fast-food restaurant from the time an order...
The mean waiting time at the drive-through of a fast-food
restaurant from the time an order is placed to the time the order
is received is 84.3 seconds. A manager devises a new drive-through
system that he believes will decrease wait time. He initiates the
new system at his restaurant and measures the wait time for ten
randomly selected orders. The wait times are provided in the table
below. Based on the given data, is the new system effective? Use...
The mean waiting time at the drive-through of a fast-food restaurant from the time an order...
The mean waiting time at the drive-through of a fast-food
restaurant from the time an order is placed to the time the order
is received is 84.3 seconds. A manager devises a new drive-through
system that he believes will decrease wait time, on average. He
initiates the new system at his restaurant and measures the wait
time for 12 randomly selected orders. Summary statistics for the 12
orders are given below: Mean 78.4 Standard deviation 14.1
Calculate the test-statistic (with...
The mean waiting time at the drive-through of a fast-food restaurant from the time an order...
The mean waiting time at the drive-through of a fast-food
restaurant from the time an order is placed to the time the order
is received is 86.3 seconds. A manager devises a new drive-through
system that she believes will decrease wait time. As a test, she
initiates the new system at her restaurant and measures the wait
time for 10 randomly selected orders. The wait times are provided
in the table to the right. Complete parts (a) and (b) below....
The mean waiting time at the drive-through of a fast-food restaurant from the time an order...
The mean waiting time at the drive-through of a
fast-food restaurant from the time an order is placed to the time
the order is received is 85.5
seconds. A manager devises a new drive-through system that he
believes will decrease wait time. As a test,he
initiates the new system at his restaurant and measures the wait
time for 10
randomly selected orders. The wait times are provided in the table
to the right. Complete parts (a) and (b) below.
109.0...
The mean waiting time at the drive-through of a fast-food restaurant from the time an order...
The mean waiting time at the drive-through of a fast-food
restaurant from the time an order is placed to the time the order
is received is 84.3 seconds. A manager devises a new drive-through
system that he believes will decrease wait time. He initiates the
new system at his restaurant and measures the wait time for ten
randomly selected orders. The wait times are provided in the table
below. Based on the given data, is the new system effective? Use...
we considered the mean waiting time at the drive-through of a fast-food restaurant. In addition to...
we considered the mean waiting time at the drive-through of a
fast-food restaurant. In addition to concern about the amount of
time cars spend in the drive-through, the manager is also worried
about the variability in wait times. Prior to the new drive-through
system, the standard deviation of wait times was 22.1 seconds. Use
the data in the table below to decide whether there is evidence to
suggest the standard deviation wait-time is less than 22.1 seconds.
Recall that in...
We considered the mean waiting time at the drive-through of a fast-food restaurant. In addition to...
We considered the mean waiting time at the drive-through of a
fast-food restaurant. In addition to concern about the amount of
time cars spend in the drive-through, the manager is also worried
about the variability in wait times. Prior to the new drive-through
system, the standard deviation of wait times was 18.0 seconds. Use
the data in the table below to decide whether there is evidence to
suggest the standard deviation wait-time is less than 18.0 seconds.
Recall that in...
The average time between arrivals of customers at a fast food restaurant drive through is 4...
The average time between arrivals of customers at a fast food
restaurant drive through is 4 minutes. Assuming an exponential
distribution, what is the probability that the next customer
arrives in less than 3 minutes?
Group of answer choices 39.35% 52.76% 47.24% 60.65% 75.00%
If u can please show excel input
You are the manager of a restaurant for a fast-food franchise. Last month, the mean waiting...
You are the manager of a restaurant for a fast-food franchise.
Last month, the mean waiting time at the drive-through window for
branches in your geographical region, as measured from the time a
customer places an order until the time the customer receives the
order, was 3.6 minutes. You select a random sample of 81 orders.
The sample mean waiting time is 3.79 minutes, with a sample
standard deviation of 0.9 minute. At the 0.10 level of
significance, is there...
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