QUESTION 10
Suppose the cutoff score on the null distribution is Zcrit +1.99. You could reject the null hypothesis if the sample score was:
0.216
-2.86
1.23
-2.68
QUESTION 11
Given the scenario below, what is the critical value? Americans typically take off 5 sick days each year, with a standard deviation of 2 days. A researcher would like to know whether psychiatrists take off fewer sick days than the average American. The researcher obtains a sample of 16 psychiatrists who, on average, take 3 days of sick leave per year. Test this researcher's hypothesis using an alpha level of 0.01.
Critical value: 1.96
1.9
1.64
2.33
QUESTION 12
Given the obtained statistic is t = -1.8, alpha = 0.05, tail (Sample pop): There were 21 subjects. What is the decision?
Reject Alternative Hypothesis
Retain Alternative Hypothesis
Retain Null Hypothesis
Reject Null Hypothesis
QUESTION 13
A binomial (sign) test is most appropriate when:
you are comparing less than 2 groups
you are comparing population to sample mean
you are flipping a coin
you are comparing more than 2 groups