The manager of a large department store is reviewing customer service records an
ID: 3133796 • Letter: T
Question
The manager of a large department store is reviewing customer service records and wonders whether customer satisfaction is associated with age. He randomly selects 200 customers and asks them how satisfied they are. He classifies the data by the age of the customer (teenager, young adult, adult, or senior citizen) and by their degree of satisfaction (very satisfied, satisfied, unsatisfied, very unsatisfied). A hypothesis test for which of the following would be best for addressing the manager's question? One mean, known One mean, unknown Paired data Two means, using independent samples ANOVA One proportion Two proportions Independence of categorical variables ()Explanation / Answer
1.
As we have categorical variables here,
OPTION H: Independence of categorical variables (chi^2)
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2.
As we only have one mean here, and the population standard deviation is known (0.03), then
OPTION A: one mean, sigma known [ANSWER]
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3.
As we talk about percentages of two groups, then it is
OPTION G: Two proportions [ANSWER]
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4.
As we only have one sample and we examine proportions,
OPTION E: ONE PROPORTION [ANSWER]
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