Brand managers become concerned if they discover that customers are aging and gradually moving out of the high-spending age groups. For example, the average Cadillac buyer is older than 60, past the prime middle years that are typically associated with more spending. Part of the importance to Cadillac of the success of the Escalade model has been its ability to draw in younger consumers. If a sample of 41 Escalade purchasers has an average age of 50 with a standard deviation of 22, is this compelling evidence that Escalade buyers are younger on average than the typical Cadillac buyer? (Assume that the Central Limit Theorem holds and that alpha = 0.10) (a) State the null and alternative hypotheses.
(b) In the context of this problem, explain when Type I and Type II errors would be committed.
(c) What is the test statistic for this hypothesis test?
(d) What is the relevant critical value for this hypothesis test?
(e) What is your conclusion for this hypothesis test?

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

step-by-step explanation:

ask goog great chance of finding the solution there

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step-by-step explanation: