represent the true proportion of workers who would like to attend a self-improvement course in the recent study and the past study, respectively.137.Referring to Table 10-11, if the firm wanted to test whether this proportion has changed from the previous study, which represents the relevant hypotheses?a)H0: 2ππ-= 0 versus H1: 12ππ-≠0b)0: 12ππ-≠0 versus H1: 12ππ-c)H0: 2ππ-≤0 versus H1: 12ππ-> 0d)0: 12ππ-≥0 versus H1: 12ππ-1H= 01H< 0

74 Two-Sample TestsANSWER:aTYPE: MC DIFFICULTY: EasyKEYWORDS: Ztest, difference between two proportions, form of hypothesis138.Referring to Table 10-11, if the firm wanted to test whether a greater proportion of workers would currently like to attend a self-improvement course than in the past, which represents the relevant hypotheses?1H= 01H< 0TYPE: MC DIFFICULTY: EasyKEYWORDS: Ztest, difference between two proportions, form of hypothesis139.Referring to Table 10-11, what is the unbiased point estimate for the difference between the two population proportions?TYPE: MC DIFFICULTY: EasyKEYWORDS: point estimate140.Referring to Table 10-11, what is/are the critical value(s) when performing a Z test on whether population proportions are different if α= 0.05?TYPE: MC DIFFICULTY: EasyKEYWORDS: Ztest, difference between two proportions, critical value141.Referring to Table 10-11, what is/are the critical value(s) when testing whether population proportions are different if α= 0.10?a)±1.645b)±1.96c)-1.96d)±2.08ANSWER:

Two-Sample Tests 75aTYPE: MC DIFFICULTY: EasyKEYWORDS: Ztest, difference between two proportions, critical value142.Referring to Table 10-11, what is/are the critical value(s) when testing whether the current population proportion is higher than before if α= 0.05?TYPE: MC DIFFICULTY: EasyKEYWORDS: Ztest for the difference between two proportions, critical value143.Referring to Table 10-11, what is the estimated standard error of the difference between the two sample proportions?TYPE: MC DIFFICULTY: ModerateKEYWORDS: Ztest, difference between two proportions, standard error