Question

Find a 90% confidence interval for a population mean μ for these values. (Round your answers to three decimal places.)

(a) n = 105, x = 0.81, s2 = 0.089

(b) n = 90, x = 21.3, s² = 3.53

(c) Interpret the intervals found in part (a) and part (b):

A. There is a 10% chance that an individual sample proportion will fall within the interval.

B. In repeated sampling, 90% of all intervals constructed in this manner will enclose the population mean.

C. In repeated sampling, 10% of all intervals constructed in this manner will enclose the population proportion.

D. 90% of all values will fall within the interval.

E. There is a 90% chance that an individual sample proportion will fall within the interval.

Answer 1