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INFERENTIAL STATISTICS
Inferential Statistics
Estimate population parameters and test hypotheses from sample data — confidence intervals (z or t) and one-sample t-tests with p-values and full worked steps.
SAMPLE MEAN (x̄)4.36
SAMPLE STD (s)0.5641
COUNT (n)10
STD ERROR0.1784
CRITICAL t*2.262
LOWER BOUND3.9565
UPPER BOUND4.7635
WORKED SOLUTION
x̄ ± t* · (SE), where SE = s/√n = 0.1784
t* (α/2 = 0.025000000000000022) = 2.262 (df = 9)
4.36 ± 2.262 × 0.1784 = [3.9565, 4.7635]
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