The manager at a local grocery store thinks customers might benefit from a self-checkout aisle because the variation in customer wait times at checkout is high enough to warrant providing alternative checkout options for customers with fewer needs. To aid the decision, the manager decides to analyze the standard deviation of the wait times for a random sample of customers. A sample of 30 random customers had their wait times recorded. The wait times in minutes for one of these samples can be found in the table below. Sample of 30 grocery store customer wait times 11.2 7.2 6 5.8 3.8 30.2 2.8 4.4 10 5.6 12.7 5.2 15 11.6 18.2 29.8 10.4 8.6 4.4 1.8 1.6 4.4 5.2 27.6 12.8 3.6 7.4 5.2 22.8 1.4 Using technology, compute the sample standard deviation and sample variance for the accompanying sample of 30 grocery store customer wait times (round your answers to two decimal places). Provide your answer below:
The manager at a local grocery store thinks customers might benefit from a self-checkout aisle because the variation in customer wait times at checkout is high enough to warrant providing alternative checkout options for customers with fewer needs. To aid the decision, the manager decides to analyze the standard deviation of the wait times for a random sample of customers.
A sample of 30 random customers had their wait times recorded. The wait times in minutes for one of these samples can be found in the table below.
Sample of 30 grocery store customer wait times
|
11.2 |
|
7.2 |
|
6 |
|
5.8 |
|
3.8 |
|
30.2 |
|
2.8 |
|
4.4 |
|
10 |
|
5.6 |
|
12.7 |
|
5.2 |
|
15 |
|
11.6 |
|
18.2 |
|
29.8 |
|
10.4 |
|
8.6 |
|
4.4 |
|
1.8 |
|
1.6 |
|
4.4 |
|
5.2 |
|
27.6 |
|
12.8 |
|
3.6 |
|
7.4 |
|
5.2 |
|
22.8 |
|
1.4 |
Using technology, compute the sample standard deviation and sample variance for the accompanying sample of 30 grocery store customer wait times (round your answers to two decimal places).
Provide your answer below:
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