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Sample Size - Coggle Diagram
Sample Size
What information is required for choosing sample size
Standard deviation
Estimated population
Beta
Can be set by the experimenter and a sample size is fixed
Delta
Practical difference the experimenter wants to defect using the test
Alpha
Level you set
Default in minitab
Sample size calculations: Choosing the right method
Sample Z
Means testing
Do not have statistics of a population
Comparing to a target value
Sample T
Already have statistics about population
Means testing
Comparing to a target value
Sample Variance
Variance testing
Comparing variance
Proportion Testing (rate, x per y)
Running and Analyzing Sample Size Tests in Minitab
Backing to target power
Sample size is entered and power values are left blank
Power and Sample Size
Shows required sample size for each difference and target power
A review of hypothesis testing errors
Type error 2
When the null hypothesis is not true
Type 1 error
Occurs when you reject the null hypothesis is true