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This question was created from HW4(1)


Im not sure where to even start with this, these are the 2 questions I'm stuck on


1. Practicing with standard normal distributions: A
company is interested in determining the percentage of
urinary catheters that meet design specifications in
terms of diameter. The average diameter (sample
mean) is 2.98mm. The standard deviation of diameters
(sample standard deviation) is 0.06mm and the design
)18 Fr / 6.0 man
. size
in French scale
specifications are as follows: 3mm+0.02mm. What is
and milmeters
the percentage of urinary catheters that fall within the
specifications? In one sentence, please place the
bladder opening
finding in the context of the problem.
urine drainage port
* balloon portvolume of fluid recommended to inflate balloon marked
2. Practicing with confidence intervals: You have been hired by a cholesterol-lowering drug
company. Your first task is to determine the 98% confidence interval for the true
population average of cholesterol levels (population mean). The sample mean is 208mg/dL
and the sample standard deviation is 17mg/dL. The sample size is 2500. What is the range
of values that you are 98% confident contains the population mean? (Don't forget units.)

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