National muffler company claims it will change your muffler in less
National Muffler Company claims it will change your muffler in less than 30 minutes. An investigative reporter for WTOL Channel 11 monitored 30 consecutive muffler changes at the National outlet on Liberty Street. The number of minutes to perform changes is reported below.
44
12
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31
26
22
30
26
18
28
12
40
17
13
14
17
25
29
15
30
10
28
16
33
24
20
29
34
23
13
What is the median time to change a muffler? (Round your answer to 2 decimal places.)
What is the value of the first and third quartiles? (Round your answers to 2 decimal places.).
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