EDCO 735 Essay: Data Screening Basics Assignment Prompts · If given an extremely non-normal empirical frequency distribution, does it make sense for a researcher to find the percentile rank using the...

EDCO 735
Essay: Data Screening Basics Assignment Prompts
· If given an extremely non-normal empirical frequency distribution, does it make sense for a researcher to find the percentile rank using the z score and the standard normal distribution table? Why or why not? Describe two distributions (other than normal) that a researcher might encounter in data and when.
Answer: Z-score and standard normal distribution will not find percentile rank of a non-normal empirical frequency distribution. It is a starting place for researchers who wish to address non-normality for the perspective of linear model. The two distributions other than normal are relative frequency distribution and grouped frequency distribution. Day-to-day statistical applications use relative frequency distribution. It refers to total observations associated with each category. It is calculated for each class interval These frequencies can be written as fraction, percent or decimals. Combined relative frequencies up to current category give cumulative relative frequency. Hence, relative frequency...