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Analyze
: 15 Questions
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1. Which variation type is not captured in Multi-vari studies?
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Shift to Shift variation
Part to part variation
Side to side variation
Within part variation
3. If one is interested to understand the linear relationship between 2 variables, including its direction and strength, we refer to:
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Covariation
Causation
Cohabitation
Correlation
2. Multi-vari studies are not useful when the objective is to:
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Analyze the stability of the process
Analyze the normality of the process
Analyze the sources of variation
Analyze where excessive variation exists
4. Which coefficient provides both the strength and direction of the relationship between the independent and dependent variables?
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Coefficient of Determination
Coefficient of Causation
Coefficient of Covariation
Coefficient of Correlation
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.
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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?
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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?
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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?
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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
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0.777
0.826
0.829
1.407
10. What hypothesis is being tested in Regression analysis?
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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?
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Confidence level
Confidence interval
Standard error of the mean
Mean of the sample means
12. What is one way of testing the null hypothesis?
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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?
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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?
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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?
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2-sample t test
1-sample t test
2-sample z test
1-sample z test
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