If the rectangle has a fixed width of 300, it means that
where and
are width and length, respetively.
So given the length , the are would be
An artist sells drawings. Each materials that he uses cost $30. He sells his drawings for $90. If he spends $600 for advertiseme
1 answer:
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Answer:
a)
b)
Step-by-step explanation:
We have to build appropriate null and alternate hypothesis for the given scenarios.
a) Population mean, μ = $62,500 per year
The market research wants to find whether the mean household income of mall shoppers is higher than that of the general population.
We would use one-tail(right) test to perform this hypothesis.
b) Population mean, μ = 2.6 hours
The company want to know the average time to respond to trouble calls is different or not.
We would use two-tail test to perform this hypothesis.