Measurement and evaluation of human performance Flashcards
Standard deviation
A measure of the spread of the data values around the mean
Mean
Sum of values by the number of values (average)
Assuming standard deviation is not skewed: how many of data fall within 1 +- standard deviation
68%
Assuming data is not skewed: all data falls within 2 +- standard deviation
95%
What does standard deviation tell us if small?
Small sd means that data is closely clustered around the mean value. Data points are close to the same value (mean)
What does standard deviation tell us if large?
Means the data is wider spread around the mean. Data points are spread over a larger range of values( data isn’t so reliable)
Error bars
Are used to represent the variability of data (sd) graphically
What do large error bars indicate?
A large range above and below the mean gives less confidence that the mean is the true value
Coefficient of values
The SD represented as a percentage
Calculated as SD/ mean x 100
Acts as reliably when taking repeated measurements
The t test
Is used to measure whether there is a significant difference between the means of the two populations
Tells u the probability that two sets of data are the same
Null hypothesis
States that there is no significant difference between the two populations
Alternative hypothesis
States that there is a significant difference between the two populations
If p > 0.05 accept
Null hypo
If p< 0.05 accept
Alternative hypothesis
Coefficient of values
The SD represented as a percentage
Calculated as SD/ mean x 100
Acts as reliably when taking repeated measurements
The t test
Is used to measure whether there is a significant difference between the means of the two populations
Tells u the probability that two sets of data are the same
Null hypothesis
States that there is no significant difference between the two populations
Alternative hypothesis
States that there is a significant difference between the two populations
If p > 0.05 accept
Null hypo
If p< 0.05 accept
Alternative hypothesis
Correlation
Is a term used to define the extent of relatedness or relationship between two variables
Health related fitness
Physiologically based and determines the individuals ability to meet the physical demands of an activity
Components of health related fitness
Strength, local muscular endurance, cardio respiratory, flexibility and body composition
Healthy fat of men
15-18%
Healthy fat of women
20-25%
Strength
Ability of muscles to exert a force to overcome a resistance
Local muscular endurance
A single muscles ability to perform sustained work (cycling)
Cardio respiratory fitness
“Stamina” the ability of the body to supply enough energy to sustain sub maximal level of exercise
Benefits of cardio fitness
Improved metabolism
Efficient delivery of oxygen
Faster removal of waste
Decreased level of stress
Flexibility
The movement available by our joints, usually controlled by the length of our muscles
Benefits of flexibility
Prevents injury
Improves posture
Maintains healthy joints
Increased speed and power of muscle contraction
Improves balance during movement
Body composition
The amount of fat compared to lean body mass (muscle bone connective tissue
