1. Based on the information given below, create a confidence interval with 90% confidence. Explain what this means in a sentence. Null Hypothesis/H0 : μ = 20 Population mean = 20 Alternative...

1. Based on the information given below, create a confidence interval with 90% confidence. Explain what this means in a sentence.

• Null Hypothesis/H0 : μ = 20


• Population mean = 20


• Alternative Hypothesis/H1: μ ≠ 20 (Two tail)


• Sample size/ n= 16


• Sample mean/ = 21.3


• Standard deviation/ = 3


• Variance (s2) of 9


• Critical Values = -2.1314/2.131


• -2.1314 ＜1.73  ; Statistically Significant


• Cohen’s d


• 21.3-203 ; 0.43 ; Medium Effect


• Percentage of Variance r2 = 0.0442