If a sample has 18 observations and a 90% confidence estimate for μ is needed,the appropriate value of t is 1.740.

Question

Quizplus · Accepted Answer

A 90% confidence level corresponds to a significance level of α = 0.10. For a sample size of n = 18, the degrees of freedom for the t-distribution would be df = n - 1 = 17. Using a t-distribution table or calculator, the critical value of t for a one-tailed test with α = 0.10 and 17 df is approximately 1.740, which matches the given value. Therefore, the statement is true.

If a Sample Has 18 Observations and a 90% Confidence