Consumers own laptops of brand X for a certain amount of time before buying a new model. This time duration has a distribution with unknown mean and standard deviation 1.5. The company X expects that consumers will keep their laptop or 3.5 years. After collecting a sample of 27 customers they calculate a sample mean of 4 years. Is there enough evidence (95% significance) to support the claim that laptops are kept for more than 3.5 years?
3 answers
I will ask my friend she knows statistics! also she should reply soon.
Nevermind she was busy sorry!
Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.
See your later post.
Jooby, if you can't provide an answer to the problem, do not respond.
See your later post.
Jooby, if you can't provide an answer to the problem, do not respond.
1 answer