NUR 3405 QUIZ 4 EXAM QUESTIONS AND ANSWERS
What indexes do descriptive statistics contain? - CORRECT ANSWER✅✅- variability of distribution
- frequency distributions
- central tendency
- standard deviation
A systematic arrangement of values from lowest to highest, together with a count or percentage of how
many times each value occurred is: - CORRECT ANSWER✅✅- frequency distribution
Homogeneous data set - CORRECT ANSWER✅✅- a narrow range or smaller variation
Negative correlation coefficient - CORRECT ANSWER✅✅- relationship where one variable increases
while the other decreases
- between .00-1.00
- the higher the absolute value of a coefficient, the stronger the relationship (-.80 is stronger than +.20)
The use of inferential statistics permits a researcher to: - CORRECT ANSWER✅✅- draw conclusions
about a population based on information gathered from a sample
Statistical hypothesis testing - CORRECT ANSWER✅✅- use of objective criteria for deciding whether
research hypotheses should be accepted as true or rejected as false
Type I Error - CORRECT ANSWER✅✅- rejecting a true null hypothesis, false positive
Type II Error - CORRECT ANSWER✅✅- failing to reject a false null hypothesis, false negative
How do researchers control the risk of making a type I error? - CORRECT ANSWER✅✅- by selecting a
level of significance which is the probability that such an error will occur
, significance level (alpha) - CORRECT ANSWER✅✅- what we compare our p-value to, 0.05 is commonly
used
P < 0.05 - CORRECT ANSWER✅✅reject the null hypothesis
Chi-square test - CORRECT ANSWER✅✅- used to test hypotheses about the proportion of cases in
different categories
T-Test - CORRECT ANSWER✅✅- test the difference between the means of two groups
What important aspects of validity should an instrument or scale examine? - CORRECT ANSWER✅✅-
criterion related validity
- content validity
- construct validity
Common threats to internal validity - CORRECT ANSWER✅✅- selection
- mortality
- maturation
- history
External validity is important to EBP because it allows researchers to - CORRECT ANSWER✅✅-
generalize evidence from controlled settings to real-world practice settings
What does internal validity measure? - CORRECT ANSWER✅✅- the research results for accuracy
What are common threats to external validity? - CORRECT ANSWER✅✅- experimenter
- reactivity
- novelty (knowledge of what is being done effects outcome)
What indexes do descriptive statistics contain? - CORRECT ANSWER✅✅- variability of distribution
- frequency distributions
- central tendency
- standard deviation
A systematic arrangement of values from lowest to highest, together with a count or percentage of how
many times each value occurred is: - CORRECT ANSWER✅✅- frequency distribution
Homogeneous data set - CORRECT ANSWER✅✅- a narrow range or smaller variation
Negative correlation coefficient - CORRECT ANSWER✅✅- relationship where one variable increases
while the other decreases
- between .00-1.00
- the higher the absolute value of a coefficient, the stronger the relationship (-.80 is stronger than +.20)
The use of inferential statistics permits a researcher to: - CORRECT ANSWER✅✅- draw conclusions
about a population based on information gathered from a sample
Statistical hypothesis testing - CORRECT ANSWER✅✅- use of objective criteria for deciding whether
research hypotheses should be accepted as true or rejected as false
Type I Error - CORRECT ANSWER✅✅- rejecting a true null hypothesis, false positive
Type II Error - CORRECT ANSWER✅✅- failing to reject a false null hypothesis, false negative
How do researchers control the risk of making a type I error? - CORRECT ANSWER✅✅- by selecting a
level of significance which is the probability that such an error will occur
, significance level (alpha) - CORRECT ANSWER✅✅- what we compare our p-value to, 0.05 is commonly
used
P < 0.05 - CORRECT ANSWER✅✅reject the null hypothesis
Chi-square test - CORRECT ANSWER✅✅- used to test hypotheses about the proportion of cases in
different categories
T-Test - CORRECT ANSWER✅✅- test the difference between the means of two groups
What important aspects of validity should an instrument or scale examine? - CORRECT ANSWER✅✅-
criterion related validity
- content validity
- construct validity
Common threats to internal validity - CORRECT ANSWER✅✅- selection
- mortality
- maturation
- history
External validity is important to EBP because it allows researchers to - CORRECT ANSWER✅✅-
generalize evidence from controlled settings to real-world practice settings
What does internal validity measure? - CORRECT ANSWER✅✅- the research results for accuracy
What are common threats to external validity? - CORRECT ANSWER✅✅- experimenter
- reactivity
- novelty (knowledge of what is being done effects outcome)
