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Standard deviation 0.25 0.24 0.245 Size 25 30 A) The t statistic is -1.79;the researcher rejects the null hypothesisX B) The t statistic is -2.14; the researcher fails to reject the null hypothesis C) The t statistic is 1.79; the researcher rejects the null hypothesis x D) The t statistic is 1.04; the researcher fails to reject the null hypothesis E] The t statistic is-1.51; the researcher failsto reject the null hypothesis. 25. A fair coin is tossed 5 times. What is the probability that exactly 4 tails are observed? S132-61 A) 0.4 B) 0.313 C) 0.25 )0.156 0.073 2* 2-32 poss,bte se The following information applies to Questions 26-30, From a recent census, we obtain the following decomposition of the Australian population according to the highest degree achieved, and the unemployment rates in each category. The population unemployment rate is 5%. Highest degree Proportion Unemployment rate 7% 0.4 None 0.3 Bachelor's 5% 0.2 Master's 3% 0.1 Ph.D. 26. What is the value of x? E) 7% D)6% C) 5% B)3% A) 1% Page 9 ot 14 O. } хо@5,Sehester2 CC0294 27. what is the probability a randoml unemployed andhas a PhD? 0. Ixc-03 0.003 (8)o.030 c) 0.050 D) 0.147 ly chosen person in the population is E) 0.150 hatis the probability a randomly chosen person in the population is unemployed or has a PhD? E)0.150 D) 0.147 A)-0.003 B)0.030 C)0.050 29. What is the probability that an individual holds a postgraduate degree (i.e, a Master's and/or Ph.D.)? A) 0.1 B) 0.2 3 D) 0.4 E) 0.7 C) 0.3 30. If 500 people were randomly selected from the Australian population, what number would be expected to have a university degree? A)300 (B)150 C)100 D) 50 E) 30

Answer 1

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