7 When a t-test can be applied?: Deduce the significance of the difference between two sets of data using calculated t-test valuesWhen a t-test can be applied?:Data should have a normal distribution (aka. a continuous probability distribution )every normal curve (regardless of its mean or standard deviation) conforms to the following "rule".About 68% of the area under the curve falls within 1 standard deviation of the mean.About 95% of the area under the curve falls within 2 standard deviations of the mean.About 99.7% of the area under the curve falls within 3 standard deviations of the mean.)* Sample size of at least 10/data set*Used for two-tailed*Paired or unpaired data
9 There is a relationship between lung cancer and smoking Explain that the existence of a correlation does not establish that there is a causal relationship between two variablesRelationship vs causeSpecificityThere is a relationship between lung cancer and smokingIs smoking the cause of all lung cancers?Strong correlation but not necessarily the cause
10 Proper Study DesignWhen measuring an individual’s fitness levels it is important to ensure it is done as well as possibleMain factors to take into account:Specificity (sport specific tests….ex?)Accuracy(technical/instrument upkeep)Reliability (the degree to which a measure would produce the same result from one occasion to another) – test after skill is learned completely to avoid habituation effectValidity(sport specific test and repititions)
11 Designing sport and exercise science experiments Cause and effect experimentationDoes taking 20g of creatine phosphate 30 minutes before a resistance training workout produce significant improvement of one’s 1 rep max?What’s wrong with this design?How can it be designed better?PRE-TEST----TREATMENT W/ CPPOST-TEST
12 Here’s a hint: EXPERIMENTAL GROUP PRE-TEST ------- ------ POST TEST CONTROLGROUP
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