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 α = 0.10 level of significance.
106.5
67.4
58.0
75.9
65.1
80.4
95.5
87.3
70.9
71.0
The sample mean wait time is _____
seconds. (Report this value exactly as it appears in
Minitab Express. Do not round.)
The sample standard deviation of wait times is _____
seconds. (Report this value exactly as it appears in
Minitab Express. Do not round.)
The test statistic for this test is
t0=______. (Calculate this
value in a single step in your calculator using the
sample statistics reported above, and report your answer rounded to
3 decimal places.)
We (reject / fail
to reject) H0.
The
given data (does / does
not) provide significant evidence that the new
drive-through system is effective in reducing the
mean reducing wait time.