31. 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 87.5 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. 107.1 79.1 68.7 93.7 59.3 86.3 76.7 69.5 64.7 84.9 Suppose the wait time is normally distributed. Is the new system effective? Use the a = 0.1 level of significance.

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31. 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 87.5 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.
Suppose the wait time is normally distributed. Is the new system effective?
Use the a = 0.1 level of significance.
107.1
79.1
68.7
93.7
59.3
86.3
76.7
69.5
64.7
84.9
Transcribed Image Text:31. 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 87.5 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. Suppose the wait time is normally distributed. Is the new system effective? Use the a = 0.1 level of significance. 107.1 79.1 68.7 93.7 59.3 86.3 76.7 69.5 64.7 84.9
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