Research Methods & Evidence-Based Practice Flashcards
7 cards from real Radiation Health and Safety Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Research Methods & Evidence-Based Practice flashcards as text
A p-value of 0.03 most accurately means:
Answer: Results this extreme would occur 3% of the time if the null were true
The p-value is the probability of data at least this extreme assuming the null hypothesis is true.
A 95% confidence interval for a relative risk is 0.8 to 1.4. What can be concluded?
Answer: The result is not statistically significant at the 0.05 level
An interval that includes 1.0 means no significant difference at the 0.05 level.
Sensitivity of a screening test is defined as the proportion of:
Answer: People with the disease correctly identified as positive
Sensitivity is true positives divided by all people who actually have the condition.
Specificity is calculated as:
Answer: True negatives divided by all without the disease
Specificity is the proportion of disease-free people correctly testing negative.
A Type I error occurs when a researcher:
Answer: Rejects a true null hypothesis
A Type I error is a false positive: rejecting a null hypothesis that is actually true.
Which statistic describes how spread out individual measurements are around the mean?
Answer: Standard deviation
Standard deviation quantifies the dispersion of data around the mean.
Patient dose data are heavily right-skewed by a few very high values. Which central measure is most appropriate?
Answer: Median
The median is resistant to extreme values in skewed distributions.
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