Question: a. Using the formula for error, E, find the maximum error given a confidence level, c, = 0.90,standard deviation,=2.5 and sample size,, n = 36.

a. Using the formula for error, E, find the maximum error given a confidence level, c, = 0.90,standard deviation,=2.5 and sample size,, n = 36.

b. Using the formula for error, E, find the maximum error given a confidence level, c, = 0.75,standard deviation,=1.5 and sample size,, n = 50.

c.Use the TI-84 or otherwise determine the confidence interval for the population mean given c = 0.95, x-bar = 15, s = 2.0 and n = 60()

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