IBHRE Research Methodology UPDATED
ACTUAL Exam Questions and CORRECT
Answers
mean - CORRECT ANSWER - the average
find total number of numbers then divide by the amount of numbers
example:
1,3,4,5, mean = (1+3+4+5)/4 = 3.25
median - CORRECT ANSWER - the middle value when numbers are in order
example:
1,3,6,8,9 median = 6
45, 56, 123 median = 56
mode - CORRECT ANSWER - the value that is written the most
example:
2,4,4,5,6 Mode = 4
range - CORRECT ANSWER - the largest number subtract the smaller number
example
1,1,2,3,5,6,range = 6-1 = 5
standard deviation - CORRECT ANSWER - square root variance use to measure how
tightly points are clustered around mean
, most medical work requires +/- 2 standard deviations to be statistically significant
shown on a graph is histogram
null hypothesis - CORRECT ANSWER - predicts there is no relationship between two
variables
rejecting the null hypothesis means the P value is less than or equal to your significance level
P-value - CORRECT ANSWER - how likely it is your data would have occurred under the
null-hypothesis of your given test
- ranges from 0 (total certainty) to 1.0 (total uncertainty)
- smaller than 0.01 (1%) is adequate for medical statistic probability
correlation coefficient - CORRECT ANSWER - measures the strength of relationship
between variables
measured R value = regression coefficient
you want a tight correlation (closer to 1.0 the better)
one variable can predict the other
shown on a graph known as a scatter plot
line on the plot is the "line of best fit" or "regression" line
R value - CORRECT ANSWER - R = regression coefficient
you want a tight correlation (closer to 1.0 the better)
line on plot is "line of best fit" or "regression" line
sensitivity - CORRECT ANSWER - how sensitive a test is at detecting a disease in
diseased patient
- create false negative results
- missed sick patients
ACTUAL Exam Questions and CORRECT
Answers
mean - CORRECT ANSWER - the average
find total number of numbers then divide by the amount of numbers
example:
1,3,4,5, mean = (1+3+4+5)/4 = 3.25
median - CORRECT ANSWER - the middle value when numbers are in order
example:
1,3,6,8,9 median = 6
45, 56, 123 median = 56
mode - CORRECT ANSWER - the value that is written the most
example:
2,4,4,5,6 Mode = 4
range - CORRECT ANSWER - the largest number subtract the smaller number
example
1,1,2,3,5,6,range = 6-1 = 5
standard deviation - CORRECT ANSWER - square root variance use to measure how
tightly points are clustered around mean
, most medical work requires +/- 2 standard deviations to be statistically significant
shown on a graph is histogram
null hypothesis - CORRECT ANSWER - predicts there is no relationship between two
variables
rejecting the null hypothesis means the P value is less than or equal to your significance level
P-value - CORRECT ANSWER - how likely it is your data would have occurred under the
null-hypothesis of your given test
- ranges from 0 (total certainty) to 1.0 (total uncertainty)
- smaller than 0.01 (1%) is adequate for medical statistic probability
correlation coefficient - CORRECT ANSWER - measures the strength of relationship
between variables
measured R value = regression coefficient
you want a tight correlation (closer to 1.0 the better)
one variable can predict the other
shown on a graph known as a scatter plot
line on the plot is the "line of best fit" or "regression" line
R value - CORRECT ANSWER - R = regression coefficient
you want a tight correlation (closer to 1.0 the better)
line on plot is "line of best fit" or "regression" line
sensitivity - CORRECT ANSWER - how sensitive a test is at detecting a disease in
diseased patient
- create false negative results
- missed sick patients
