분류 전체보기(76)
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Sample size
The variables that determine the sample size are population size, margin of error, confidence level, and standard deviation.N: population sizeThe total population of the group to be analyzed(e.g., total number of voters in an election poll)n: sample sizeThe total number of respondents in a surveye: margin of error or confidence intervalZ: The z-score corresponding to the confidence level is used..
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Confidence interval 2024.10.25
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Probability distribution 2024.10.25
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t test
The t test is a type of estimation test that determines whether the difference between the means of two data sets is significantly different or not.Limitations and Assumptions: Data for performing a t test must meet the following conditions:● ramdom sampling● independent measurements or observations● normal distributions● equal variancet-test methodology and classification according to hypothesi..
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Test statistics
A statistic calculated from data collected for hypothesis testingA statistic that serves as a criterion for determining the rejection range in hypothesis testingRejects/accepts the null hypothesis by comparing it to the significance level value
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Hypothesis testing procedure 2024.10.25