Asimple random sample with n=54 provided a sample mean of 22.5 and a sample standard deviation of 4.4.
a. develop a 90% confidence interval for the population mean.
b. develop a 95% confidence interval for the population mean.
c. develop a 99% confidence interval for the population mean.
d. what happens to the margin of error and the confidence interval as the confidence level is increased?

step-by-step explanation:

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look in attachments

step-by-step explanation:

a = (-2, 0)

b= (-4, 0)

c = (-5,2)

d = (-1,2)

step-by-step explanation:

rectangles are made up of 4 right angles, which means that a side and a base meet perpendicular to one another.   their slopes then have to reflect perpendicular slopes.   perpendicular slopes are opposite reciprocals of one another.   for example, if the slope of one line is +2/3, then the perpendicular slope to that would be -3/2.   so we look for that combination in our choices.

all of them satisfy that condition (so what's the question, i guess? )

43

step-by-step explanation:

not sure if this is supposed to be a trick question. 43 is the only one that makes any sense.