<span>A medical researcher wants to investigate the amount of time it takes for patients' headache pain to be relieved after taking a new prescription painkiller. She plans to use statistical methods to estimate the mean of the population of relief times. She believes that the population is normally distributed with a standard deviation of 18 minutes. How large a sample should she take to estimate the mean time to within 4 minutes with 97% confidence?
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n = [z*s/E]^2
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n = [2.17*18/4]^2 = 96 when rounded up
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From the Formula:
Distance = Sqr Root [ (x2- x1)^2 + (y2 - y1)^2 ]
Distance = Sqr Root [ (20 --15)^2 + 18 -18)^2 ]
Distance = Sqr Root [ 1,225 + 0]
Distance = 35
Answer:
O -4
Step-by-step explanation:
As you can see, the line moves down (-4) and moves right (1)
Slope = rise/run = -4/1 = -4
2% of 1000 is 20 and 5% of 800 is 40 so account b earns more
