Try It 10.3.21-T Question Help The mean waiting time at the drive-through of a f
ID: 3361075 • Letter: T
Question
Try It 10.3.21-T Question Help The mean waiting time at the drive-through of a fast-food restaurant from the time 101 3 800 an order is placed to the time the order is received is 85.2 seconds. A manage 67 967 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 562 876 664 870 Click the icon to view the table of correlation coefficient critical values. (a) Because the sample size is small, the manager must verify that the wait time is normally distributed and the sample does not contain any outliers. The normal probability plot is shown below and the sample correlation coefficient is known to be r-0.992 Are the conditions for testing the hypothesis satisfied? Expected z-score the conditions satisfied. The normal probability plot ! I than linear enough, since the correlation coefficient is lick to select your answer(s) and then click Check AnswerExplanation / Answer
a)Yes. the conditions are satisfied.
The normal probability plot is linear enough since the correlation coefficient is near to 1.(The data appear to be normally distributed and there are no outliers)