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In 2010 the average amount spent per week on fast food was $24.50. It is widely suspected that people today are more healthy conscious. Tha
In 2010 the average amount spent per week on fast food was $24.50. It is widely suspected that people today are more healthy conscious.
Tha manager if a fast food outlet records tha amount spend for 9 weeks.
16 14 19 26 24 16 10 19
Assuming that the amounts are normally distributed with a known population standard deviation of $6.60, can we conclude that the mean amohnt spent per week on fast food has decreased? Use alpha = 0.01
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