For a normal population, is T(n - 1). True, false For sigma unknown, an approxim

Question

For a normal population, is T(n - 1). True, false For sigma unknown, an approximate 95% confidante interval for mu is given by X plusminus T_.025 (n - 1) s/squareroot n. true, false For a two-tailed test of Ho:mu = mu_o vs Ha: mu mu_o, if n = 11, TS = 1.81, then p-value =.01,.02.05,.10, none of these For a two-talled test of Ho: mu = mu_o vs Ha: mu mu_ov if n = 11, TS = 3.17, then p-=value = 0.1, 0.2,.05,.10, none of these (20) = 1.33, 1.72, 2.09, 2.53, none of these P(T_i (20) T_.05 (20)) =.05,.95,.10,.90, none of these There are three equivalent ways to test Ho:mu=mu_0 vs Ha: mu=mu_0, true false If alpha = size of the test =.05, and the p-value = 002, then we fail to reject Ho, reject Ho If alpha = size of the test =.05, and the p-value = 20, then we fail to reject Ho, reject Ho Assume we are testing Ho:mu=100 vs Ha:mu=100. If TS=x - 100/3/squareroot n = T(12) = 2.68, then reject Ho, do not reject Ho In 19., the p-value is.01,.02,.05,.10, none of these Assume we are testing Ho: mu100. If Ts=x-100/x/squareroot n = T(12) = 2.68, then reject Ho, do not reject Ho In 21, the p-value is.01,.02,.05,.10, none of these If n=sample size>30, and we are testing Ho: mu = 100 vs Ha: mu=100, then x-100/s/squareroot n is approximately N(0,1). true, false The person who invented the T-distribution was Trump, Rubio, Cruz, Kasich, Carson, W.S. Gossett

Explanation / Answer

9) True

10) True       Since sigma is not known then t - test is used. if sigma is known then z-test is used

11) Correct Answer (d)

12) Correct Answer (a)

13) Correct Answer (c)

14) Correct Answer (a)

15) Correct Answer (a)

16) True

17) Correct Answer (b)         if P value > alpha (0.05) we accept H0 otherwise reject H0

18) Correct Answer (a)

19) Correct Answer (b)              If t <= tcrit we accept H0 otherwiese reject H0

20) Correct Answer (b)

21) Correct Answer (a)

22)Correct Answer (a)

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