Answered

At Westonci.ca, we provide clear, reliable answers to all your questions. Join our vibrant community and get the solutions you need. Ask your questions and receive accurate answers from professionals with extensive experience in various fields on our platform. Connect with a community of professionals ready to help you find accurate solutions to your questions quickly and efficiently.

A service department at a dealership calculates the average cost of service done at their department to be $1000 with a standard deviation of $200. The service department serviced20 vehicles today. What is the probability the average cost of service for the 20 vehicles is between $900 and $1100?A)0.38B)0.97C)Sample size is too small, we do not know if service costs are normally distributed

Sagot :

From Central limit theorem, we must consider a sample based in at least 30 or more obwervations. That is, the sample is not significant to consider the service costs as normally distributed.

Thanks for using our platform. We aim to provide accurate and up-to-date answers to all your queries. Come back soon. Thanks for stopping by. We strive to provide the best answers for all your questions. See you again soon. Get the answers you need at Westonci.ca. Stay informed by returning for our latest expert advice.