Construct the confidence interval given: 𝑐 = .98, 𝑥̅ = 7.3, 𝑠 = .35, 𝑛 = 14, assuming the population is normally distributed.

Answer 1

CI = 𝑥̅ +/- tcritical * s/sqrt(n).

t-critical for 98 confidence level (t for alpha = 0.01) and n-1 = 13 degrees of freedom = 2.65

so CI = 7.3 +/- 2.65 * 0.35/sqrt(14)