To find: The meaning of the confidence interval in terms of wait times for customers.
95% of the customers who visit the store have a wait time between 4.8 to 6.0 minutes.
Given information:
Given, a grocery store manager wanted to determine the wait times for customers in the express lines. He timed customers chosen at random as follows:
The mean and standard deviation for the given data set are
The approximate margin of error is 0.6 minute at 95% confidence level.
The confidence interval for a 95% confidence level is
Calculation:
The confidence interval means that 95% of the customers who visit the store have a wait time between 4.8 to 6.0 minutes.
Conclusion:
95% of thecustomers who visit the store have a wait time between 4.8 to 6.0 minutes.
Chapter 11 Solutions
High School Math 2015 Common Core Algebra 2 Student Edition Grades 10/11
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