Question
A car dealershipwants to estimate the number of days it takes a salesman to sell a Chevrolet Equinox. A random sample of 40 cars had
A car dealershipwants to estimate the number of days it takes a salesman to sell a Chevrolet Equinox. A random sample of 40 cars had a mean time on the dealer's lot of 44 days. Assume a population standard deviation of 6.0 days.
What is your point estimate for the population mean for days to sale?
Find the 95% confidence interval for the population mean. Put your lower bound estimate on the first blank and your upper bound estimate on the second blank. Answers to 2 decimals.
Suppose a competitor dealership claims that it takes them an average of 45 days to move an Equinox off its lot. From a statistical perspective, how does this compare to the dealership we have been talking about in this problem?
- A.There isnostatistically significant difference between this dealership and the competitor in terms of how long it takes to sell an Equinox. Since the competitor's mean of 45does not fall withinour confidence interval, it is a possible true mean for our dealership as well.It's likely that they sell this type of car in the same amount of time.
- B.Thereisa statistically significant difference between this dealership and the competitor in terms of how long it takes to sell an Equinox. Since the competitor's mean of 45falls withinour confidence interval, it is not likely to be a possible true mean for our dealership.It is not likely that they sell this type of car in the same amount of time.
- C.Thereisa statistically significant difference between this dealership and the competitor in terms of how long it takes to sell an Equinox. Since the competitor's mean of 45does not fall withinour confidence interval, it is not likely to be a possible true mean for our dealership.It is not likely that they sell this type of car in the same amount of time. It is not likely that they sell this type of car in the same amount of time.
- D.There isnostatistically significant difference between this dealership and the competitor in terms of how long it takes to sell an Equinox. Since the competitor's mean of 45falls withinour confidence interval, it is a possible true mean for our dealership as well. It's likely that they sell this type of car in the same amount of time.
Step by Step Solution
There are 3 Steps involved in it
Step: 1
Get Instant Access to Expert-Tailored Solutions
See step-by-step solutions with expert insights and AI powered tools for academic success
Step: 2
Step: 3
Ace Your Homework with AI
Get the answers you need in no time with our AI-driven, step-by-step assistance
Get Started