UTA NURS 3321-600. Module 3: Knowledge Check 3c

Question 1

UTA NURS 3321-600. Module 3: Knowledge Check 3c. What is a homogeneous sample?

• A sample where all elements are very similar in a specific characteristic
• A sample where all elements are diverse in various characteristics
• A sample that includes people, events, or objects
• A sample that is representative of the entire population

Question 2

Why might researchers use stratified sampling?

• To ensure equal probability for all elements
• To obtain better representation of smaller groups
• To randomly select clusters
• To select elements based on convenience

Question 3

What should researchers consider if their study fails to achieve significant results?

• Increasing the alpha level
• Decreasing the sample size
• Repeating the study with a larger sample size
• Ignoring the results

Question 4

What distinguishes indirect measurement from direct measurement?

• Indirect measurement uses instruments
• Indirect measurement measures characteristics that cannot be perceived with the senses
• Indirect measurement is less accurate
• Indirect measurement is more precise

Question 5

Why is it important to report reliability from both previous studies and the current study?

• To ensure the instrument is valid
• To compare the reliability across different samples
• To confirm the instrument’s accuracy
• To demonstrate the instrument’s variability

Question 6

What is predictive validity?

• The extent to which a score correlates with a score for a related construct in the present
• The extent to which a score predicts future performance on a related measurement
• The consistency of scores across different raters
• The readability of an instrument

Question 7

What is the main advantage of interviews over questionnaires?

• Lower cost
• Less participant bias
• More depth in questions
• Higher response rate

Question 8

What is a Z score?

• The probability of an event occurring
• The average of a set of values
• The number of standard deviations a value is from the mean
• The median of a set of values

Question 9

What is the purpose of substituting the mean for missing data? UTA NURS 3321-600. Module 3: Knowledge Check 3c

• To eliminate all missing data
• To introduce the maximum amount of error
• To introduce the minimum amount of error
• To delete incomplete cases

Question 10

What is a confidence interval?

• An interval that captures 95% or 99% of the values for a population
• The arithmetic average of a set of values
• The middle value in an ordered set of data
• The range of values

Question 11

What is an example of independent groups?

• Husbands and wives
• Mothers and babies
• Randomly assigned participants
• Paired samples

Question 12

What correction is commonly used when multiple T-tests are done?

• Bonferroni correction
• Chi-square correction
• Kruskal-Wallis correction
• Wilcoxon correction

Question 13

What does the intercept in a regression model represent?

• The slope of the regression line
• The estimated value of the dependent variable when all independent variables are zero
• The probability of the outcome
• The variance explained by the model

Question 14

What is the primary purpose of statistics of difference?

• To describe the sample
• To identify missing data
• To examine central tendency
• To determine if an observed difference is statistically significant

Question 15

What is the difference between statistical significance and clinical significance?

• Statistical significance is about real-world importance, while clinical significance is mathematical
• Statistical significance is mathematical, while clinical significance is about real-world importance
• Statistical significance is about sample size, while clinical significance is about effect size
• Statistical significance is about the study’s purpose, while clinical significance is about the literature review

Question 16

Be sure to show the front and back of your memory aid at this time. (This question does not count for points but is important for academic integrity).

• I have shown my memory aid or I did not use one.
• I have not shown my memory aid (wrong answer).