Question: One of the main measures of quality in the service provided by any organization is the speed in which it responds to the consumer’s complaints. A furniture store is concerned about improving their quality in the service offered. The following data represents the number of days that have passed since they got the complaint until they gave a solution to the client.

1. The producer says that the number of days that they take to provide a solution to the claim is of 20 days or less. Does it exist evidence showing that this statement is true? Prove it with a level of significance of 0.05. Make the procedure of the test manually writing all the steps of the test of hypothesis.
2. Make the same test using this time Minitab and interpret the result.
3. Verify if the population can be considered normal, making a test of normality in Minitab.

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