통계고수님들 도와주세요 ㅜㅜ

IQ points are normally distributed with μ=100 and σ=15. About 95% of people are

having IQ between _______.

A) 99.3 and 136.4 B) 70.6 and 129.4

C) 95.5 and 104.5 D) 75.3 and 124.7 정답:B

 

What is the Chi-square range that includes the probability of 0.95 for n = 20?

A) 10.851~31.410 B) 9.591~34.170

C) 8.907~32.852 D) 10.117~30.144 정답:C

 

There were four groups; we collected n = 10 from each group. Which statistics

yield the most significant F value?

A) SSB = 100, SSE = 10 B) SSB = 200, SSE = 5

C) SSB = 100, SSE = 20 D) SSB = 100, SSE = 5 정답:D

 

Ha: ρ > 0, r = - 0.6, SPSS-printed one-tailed p-value = 0.02, alpha =

0.05. What are the p-value and statistical conclusion?

A) 0.98; Do not reject Ho B) 0.02; Reject Ho

C) 0.01; Reject Ho D) 0.99; Do not reject Ho 정답:A

 

COV(X, Y) = -5. S(X) = 5, and S(Y) = 5. What is the coefficient of

determination?

A) 0.2 B) 0.04 C) -0.2 D) 1.0 정답:B

 

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