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Art [367]
3 years ago
11

Find the critical value t a/2 needed to construct a confidence interval of the given level with the given sample size. level 95%

, sample size 11
Mathematics
1 answer:
stepan [7]3 years ago
7 0
Α = 1- (95/100) = 1-0.95 = 0.05

p = 1- α/2 = 1- 0.05/2 = 1-0.025 = 0.975

Degrees of freedom, df = Sample size -1 = 11-1 = 10

From t-tables, with cumulative probability pf 0.975 and df of 10,
Critical value = 2.228
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