CSSGB Analyze

Analyze: 15 Questions

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5.The standard deviations of the squared values of x and y are 3 and 1 respectively while the standard deviation of the product of x and y is 2. Calculate the coefficient of correction. *

0.667 0.687 0.866 0.888

6. What is the probability of obtaining a test statistic that is at least as extreme as the actual calculated value, if the null hypothesis is true? *

p-value F statistic t statistic chi square statistic

7. What value provides an estimate of how much of the variation in the response variable is explained by the variation in the predictor variable? *

Coefficient of Causation Coefficient of Correlation Coefficient of Covariation Coefficient of Determination

8. Consider the linear equation y = a + bx. What do a and b represent? *

y-intercept and x-intercept y-intercept and the slope x-intercept and the slope slope for x and slope for y

9. Calculate the Y-intercept given the regression equation: y = 0.777x + 1.407 *

0.777 0.826 0.829 1.407

10. What hypothesis is being tested in Regression analysis? *

Ho: Slope = Intercept Ha: Slope = Intercept Ho: Slope = 0 Ha: Intercept = 0

11. Which score provides an estimate of where the true population mean is likely to lie? *

Confidence level Confidence interval Standard error of the mean Mean of the sample means

12. What is one way of testing the null hypothesis? *

Compare the test statistic to the p-value Compare the test statistic to a critical value Compare the p-value with the confidence level Compare the p-value with the confidence interval

13. This error results from retaining the null hypothesis when it is false? *

Type 0 error Type 1 error Type 2 error Type 3 error

14. Data sets A, B and C are normally distributed. Which hypothesis tests should we consider to test the equality of means and variances, respectively? *

T test and F test ANOVA and Bartlett's test Paired T test and Levene's test Proportion test and Chi-square test

15. The Global AHT is 100 secs. A sample of 25 calls were taken and the AHT is found to be 85 secs. What hypothesis test should be used if there is a significant difference between the Global AHT and the Team AHT? *

2-sample t test 1-sample t test 2-sample z test 1-sample z test