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A formal statement that there is an absence of relationship
Customer Question
A formal statement that there is an absence of relationship between variables when tested by a researcher is called: (Points : 1)
Null hypothesis
Type I error
Type II error
Negative interval
2. Bivariate statistics refers to the statistical analysis of the relationship between two variables. (Points : 1)
True
False
3. Positive relationships between two variables indicate that, as the score of one increases, the score of the other increases. (Points : 1)
True
False
4. A result that is probably not attributable to chance is: (Points : 1)
Type I error
Type II error
Statistical significance
In the semiquartile range
5. A score that is likely to fall into the middle 68% of scores of a normal distribution will fall inside these values: (Points : 1)
. +/ 3 standard deviations
+/ 2 standard deviations
+/ 1 standard deviation
semiquartile range
6. It is important to assess the magnitude or strength of a relationship because this assists you with deciding whether or not a variable A causes variable B. (Points : 1)
True
False
7. In a negative relationship, as the score of one variable decreases, the score on the second variable decreases. (Points : 1)
True
False
8. A set of subjects, usually randomly sampled, selected to participate in a research study is called: (Points : 1)
Population
Sample
Mode Group
Partial Selection
9. A perfect negative relationship between two variables is expressed as r=0. (Points : 1)
True
False
10. When examining the relationship between a nominal variable and an interval or ratio variable, you would create a table using the nominal variables, calculate the mode and median of the interval or ratio variable, then make a decision regarding the relationship using the mode and median. (Points : 1)
True
False
11. A Z score of +/1.96 is equivalent to these values on a normal distribution. (Points : 1)
Critical region
+/1 standard deviation
+/2 standard deviations
+/3 standard deviations
12. An assumption used by statisticians which states that population parameters are normally distributed: (Points : 1)
Central Limit Theorem
Null Hypothesis
Statistical significance
Standard deviation
13. When examining the relationship between two interval or ratio level variables, you can use a scatterplot to allow you to visualize the relationship between the two. (Points : 1)
True
False
14. Correlation coefficients, r, range from 1.00 to +1.00. (Points : 1)
True
False
15. An entire set of individuals or objects having some common characteristics is: (Points : 1)
Sample
Population
Median Group
Complete selection
16. Data which uses number values, has an equal distance between values, and has a meaningful value of zero is: (Points : 1)
Interval
Nominal
Ordinal
Ratio
17. To determine the proportion of variability in one variable that can be accounted for or explained by the variability of a second variable, you would calculate a correlation coefficient, then square it. (Points : 1)
True
False
18. A significant finding with the 2 sample ttest indicates a strong relationship exists between the 2 population means. (Points : 1)
True
False
19. Data which uses number values with an equal distance between values are: (Points : 1)
Nominal
Ordinal
Normal
Interval
20. Data which uses numbers to provide categories or labels as well as the ordering of the categories are: (Points : 1)
Nominal
Ordinal
Ratio
Interval
21. Not all variables retained in a regression model are required to be significant. (Points : 1)
True
False
22. Parametric tests can be used with any type of data. (Points : 1)
True
False
23. This term refers to how data spreads out or disperses within a distribution. (Points : 1)
Variability
Critical region
Range
Mode
24. Relevant data that are expressed in numerical form are called: (Points : 1)
Qualitative data
Quantitative data
Standard data
Multiplicative data
25. It is not necessary to look at the frequency distribution if the mean, median, and mode are known. (Points : 1)
True
False
26. Causation is synonymous with association. (Points : 1)
True
False
27. The area of the theoretical distribution where the researcher will reject the null hypothesis is called: (Points : 1)
+/ 1 standard deviation
Semiquartile range
Critical region
Standard deviation
28. The arithmetic average of the data is called the: (Points : 1)
Mean
Median
Mode
Variab
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3 years ago.
Category:
Calculus and Above
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R.R. Jha
replied 3 years ago.
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