What is the main purpose of a confidence interval?

To estimate a range in which a population parameter likely falls

Which of the following best describes descriptive statistics?

Used to summarize and organize data

Which of the following best represents clinical significance?

A statistically significant result that improves patient outcomes

What does a p-value of 0.03 mean?

There is a 3% chance the result is due to random variation

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Data Analysis & Statistical Interpretation for EBP

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Answers

1
What is the main purpose of a confidence interval?
To measure the probability of Type I error
To estimate a range in which a population parameter likely falls
To compare two means
To determine causation
2
Which of the following best describes descriptive statistics?
Used to test hypotheses
Used to make predictions about a population
Used to determine causality
Used to summarize and organize data
3
What type of statistics is used to draw conclusions beyond the sample data?
Central tendenc
Inferential statistics
Nonparametric statistics
Descriptive statistics
4
Which of the following is an example of a ratio-level measurement?
Blood type
Pain scale rating (1-10)
Weight in kilograms
Temperature in Celsius
5
Which of the following best represents clinical significance?
A p-value of 0.04
A confidence interval that includes zero
A statistically significant result that improves patient outcomes
A large sample size
6
Which statistical test is used to compare the means of two groups?
Chi-square test
Pearson correlation
Regression analysis
t-test
7
Which measure of central tendency is most affected by outliers?
Standard deviation
Mean
Median
Mode
8
Which type of measurement scale categorizes data but does NOT rank it?
Ordinal
Nominal
Ratio
Interval
9
What does a p-value of 0.03 mean?
The null hypothesis is true
There is a 3% chance the result is due to random variation
The alternative hypothesis is false
The result is not statistically significant
10
If a researcher rejects the null hypothesis when it is actually true, what type of error is this?
Sampling error
Type I error
Type II error
Measurement error

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