A local car dealer wants to know if the purchasing habits of a buyer buying extras have
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A local car dealer wants to know if the purchasing habits of a buyer buying extras have changed. He is particularly interested in male buyers. Based upon collected data he has estimated that the distribution of extras purchased is approximately normally distributed with an average of £2000 per customer. To test this hypothesis he has collected the extras purchased by the last seven male customers (£): 2300, 2386, 1920, 1578, 3065, 2312, and 1790. Test whether the extras purchased on average has changed.
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Figure 69 illustrates the Excel solution Interpretation It can be concluded that there is no signifi...View the full answer
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