A researcher reported the following covariance matrix for her 3-item (7-option Likert item responses) test. Item1 Item2 Item3 Item4 Item1 3.84 2.63 1.89 2.14 Item2 2.63 3.62 2.10 2.25 Item3 1.89 2.10 3.68 2.52 Item4 2.14 2.25 2.52 3.80 What is the value of coefficient alpha?
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Question 18
A researcher reported the following
Item1 Item2 Item3 Item4
Item1 3.84 2.63 1.89 2.14
Item2 2.63 3.62 2.10 2.25
Item3 1.89 2.10 3.68 2.52
Item4 2.14 2.25 2.52 3.80
What is the value of coefficient alpha?
Question 19
In which of the following test assumptions is coefficient alpha NOT equal to reliability?
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- Question 10.A manufacturer of inkjet printers claims that only 5% of their printers require repairs within the first year. If of a random sample of 18 of the printers, four required repairs within the first year, does this tend to refute or support the manufacturer’s claim?1.1 The alternative hypothesis is: H1: CVD and Enrollment Site are dependent. H1: The correlation between CVD and Site is zero. H1: CVD and Enrollment Site are independent. H1: The covariance between CVD and Enrollment Site is negative. H1: The covariance between CVD and Site is zero. H1: The covariance between CVD and Enrollment Site is positive. 1.2 Under independence, calculate the expected number of patients with a family history of CVD, at Hospital 2. 1.3 A necessary condition to perform the hypothesis test is: The observed frequencies must be at least 5. The expected frequencies must be at least 5. The expected frequencies must be at least 30. The cell χ2-values must be at least z0.975=1.96. The row and column totals must be at least 3030. The cell χ2-values must be at least z0.95=1.645. The observed frequencies must be at least 30. The sample size must be at least 30. 1.4 Since the critical value is - we have sufficient evidence - the null hypothesis at α=0.01 level of…Subject Extroversion Neuroticism 1 43 49 2 46 53 3 48 67 4 48 57 5 48 56 6 50 48 7 51 60 8 51 41 9 53 51 10 58 47 11 62 41 12 63 51 13 63 30 14 63 28 15 67 55 16 67 47 17 67 39 4. What is the lower bound of the Fisher's z-transformed population correlation coefficient (zeta) calculated from the data in personalities.xls? 5. What is the upper bound of the Fisher's z-transformed population correlation coefficient (zeta) calculated from the data in personalities.xls? 6. What is the lower bound of the population correlation coefficient (rho) calculated from the data in personalities.xls?