Brand managers become concerned if they discover that customers are aging and gr

Question

Brand managers become concerned if they discover that customers are aging and gradually moving out of the high-spending age groups. The average buyer for a particular brand of car is 57. A new model draws in younger customers. A sample of 49 purchasers of the new model has average age 50 (with standard deviation 27). Complete parts a and . (a) Suppose the distribution of the ages of the buyers of the new model is skewed. Does this affect the use of a normal model as the sampling O A. No, because the population standard deviation is known and n is large. O B. No, because the population standard deviation is unknown and n is large. O C. Yes, because the population standard deviation is known and n is small. O D. Yes, because the population standard deviation is unknown and n is small. How skewed can the data become without preventing the use of the t-test? O A. At-test can be used as long as n is smaller than 10 times the absolute value of the kurtosis, n 10K4 ° C. A t-test can be used as long as n is smaller than the absolute value of the kurtosis, n1K41 O D. A t-test can be used as long as n is larger than the absolute value of the kurtosis, n> K4

Explanation / Answer

a) Option A is right

Option C is right

A t-test can be used as long as n is larger than 10 times the absolute value of kurtosis

b) Option C is right

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