IB SEHS: Unit 6 Exam 2025 Questions
and Answers
sample - ANSWER✔✔-a set of data collected/selected from a statistical population by a
defined procedure
mean - ANSWER✔✔-the average used to derive the central tendency of the data in
question
standard deviation - ANSWER✔✔-used to summarize the spread of data values around
the mean
68% - ANSWER✔✔-how much of the data in a NORMAL DISTRIBUTION fall within
one SD?
95% - ANSWER✔✔-how much of the data in a NORMAL DISTRIBUTION fall within
two SD?
steps to find standard deviation - ANSWER✔✔-1. find the mean
2. subtract it from each value, square that
3. work out the mean of this new set of data
, 4. square root that
coefficient of variance - ANSWER✔✔-(v) the ratio of standard deviation to the mean
expressed as a percent
coefficient of variance: equation - ANSWER✔✔-v= (100xSD)/mean
t-test - ANSWER✔✔-a statistical test used to evaluate the size and significance of the
difference between two means
paired t-test - ANSWER✔✔-a t-test performed on a repeated measures two-group
design
-compares the control to experimental condition
-tests if a certain result is due to CHANCE
unpaired t-test - ANSWER✔✔-a t-test performed on two different subject groups
-tests if a certain result is due to SAMPLING ERROR
reliability - ANSWER✔✔-refers to how close a determined value is to thee actual value
-depends on the procedure and equipment used
specificity - ANSWER✔✔-refers to the degree to which a test is consistent and stable in
measuring what it is intended to measure
and Answers
sample - ANSWER✔✔-a set of data collected/selected from a statistical population by a
defined procedure
mean - ANSWER✔✔-the average used to derive the central tendency of the data in
question
standard deviation - ANSWER✔✔-used to summarize the spread of data values around
the mean
68% - ANSWER✔✔-how much of the data in a NORMAL DISTRIBUTION fall within
one SD?
95% - ANSWER✔✔-how much of the data in a NORMAL DISTRIBUTION fall within
two SD?
steps to find standard deviation - ANSWER✔✔-1. find the mean
2. subtract it from each value, square that
3. work out the mean of this new set of data
, 4. square root that
coefficient of variance - ANSWER✔✔-(v) the ratio of standard deviation to the mean
expressed as a percent
coefficient of variance: equation - ANSWER✔✔-v= (100xSD)/mean
t-test - ANSWER✔✔-a statistical test used to evaluate the size and significance of the
difference between two means
paired t-test - ANSWER✔✔-a t-test performed on a repeated measures two-group
design
-compares the control to experimental condition
-tests if a certain result is due to CHANCE
unpaired t-test - ANSWER✔✔-a t-test performed on two different subject groups
-tests if a certain result is due to SAMPLING ERROR
reliability - ANSWER✔✔-refers to how close a determined value is to thee actual value
-depends on the procedure and equipment used
specificity - ANSWER✔✔-refers to the degree to which a test is consistent and stable in
measuring what it is intended to measure
