IB Sports Science Topic 6 - Measurement
and Evaluation of Human Performance
Notes
6.1 - Statistical Analysis - correct answer-
6.1.1
What are error bars? - correct answer-a graphical representation of the variability of data.
6.1.2
Calculate the mean and standard deviation of a set of values - correct answer-Ox =
population
Sx = sample
stats, calc, 1 var (click set and make sure list 2 = 1)
6.1.3
What is standard deviation and what are its approximate percentages? - correct answer-SD
= summarises the spread of values around the mean.
+-1 = 68%
+-2 = 95%
this is displayed in a bell chart.
6.1.4
What is standard deviation useful for? - correct answer--for comparing the means and
spread of data between 2 or more samples.
-small SD = clustered closely around the mean, representing consistency.
-large SD = wider spread around the mean, representing inconsistency.
6.1.5
What does coefficient of variation mean? - correct answer-the ratio of the standard deviation
to the mean expressed as a %.
(Standard Deviation / mean ) x 100 = %
6.1.6
What are the 3 different types of t-tests? - correct answer-two-tailed:
paired: used to determine whether the mean difference between two sets of observations is
zero
unpaired:
6.1.6
What does a t-test test? - correct answer-tests whether there is a real difference
i.e
, testing whether mean distances ran is due to chance or exercise
6.1.6
What is the significance of the difference between 2 sets of data using calculated values for t
and appropriate tables? - correct answer-t-test requires a normal distribution and sample
size of 10.
t-test can compare 2 sets of data and measure the overlap.
6.1.7
Explain that the existence of a correlation does not establish that there is a casual
relationship between two variables - correct answer-shown as r and r squared on GDC
6.2.1
What is the importance of SARV in fitness testing? - correct answer-Specificity: test must
assess the fitness for the specific sport.
Accuracy: the instruments used to measure the component of fitness and the results are
accurate.
Reliability: degree to which the test is consistent in measuring what it is intended to
measure.
Validity: degree to which a test actually measures what it is intended to measure.
6.2.1 - Study design - correct answer-
6.2.2
What is a control group? - correct answer-a group that doesn't receive the same treatment,
this is used as a comparative group which increases reliability.
6.2.2
What is a placebo? - correct answer-when a participant believes something is affecting them
when it isn't, i.e fake pills.
6.2.2
What is double-blinding? - correct answer-when both the researchers and the participants
don't know what is being tested.
6.2.2
What is randomisation? - correct answer-a group of randomly selected people to avoid bias.
6.2.2
What is single-blinding? - correct answer-when the researchers know what is being tested
but the participants don't.
6.2.2
What is the importance of a study design in sports, exercise and health sciences. - correct
answer-control groups
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