An Effect Size of 0

question 49

Multiple Choice

An effect size of 0.53 was calculated on data after performing a hypothesis test with a single-sample t statistic in which the null hypothesis was rejected.What can be concluded about the results based on this information?

• A) The research hypothesis is supported, but the effect size is small.
• B) The sample data are significantly different from what was expected based on the population, with the sample mean 0.53 standard deviations greater than the population mean.
• C) The population mean is 0.53 standard error units greater than the sample mean, and the results are significant.
• D) The effect size is medium, which means there is a medium risk that a Type I error has occurred.