Determine margin of error used creating confidence interval

Reference no: EM13108966

The caffeine content of random sample of 34 of black coffee dispensed by new machine is measured. Mean and standard deviation are 90.8 mg and 53.77 mg, respectively.

Compute the 95% confidence interval for true mean caffeine content per cup dispensed by machine

a) (87.58, 94.02)
b) (72.04, 109.56)
c) (72.04, 94.02)
d) (88.95, 109.56)
e) (88.95, 92.65)

Determine margin of error was used in creating confidence interval above?

a) 18.76
b) 173.01
c) 1.85
d) 351.98
e) 3.22

Determine the sample size required to obtain the margin of error of 10.97 with 90% confidence interval?

Reference no: EM13108966

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