Comparing three levels of reading comprehension instruction. A study of reading comprehension in children compared three methods of instruction.21 The three methods of instruction are called Basal, DRTA, and Strategies. As is common in such studies, several pretest variables were measured before any instruction was given. One purpose of the pretest was to see if the three groups of children were similar in their comprehension skills. The READING data file gives two pretest measures that were used in this study. Use one-way ANOVA to analyze these data and write a summary of your results. R

STAT 110: Notes for Week of 10/17/16 Chapter 21 o p = population parameter. o p = sample proportion/percentage. Estimates the parameter. p = (number of successes in the sample/n) o μ = population mean/average. o x = sample mean/average. Estimates the population mean/average. o A statistic (point estimate/p) is unlikely to accurately describe the parameter, while a confidence interval (interval estimate/statistic +/- margin of error) is more likely to include the true parameter. o If the simple random sample is large enough (at least 1,000 participants), then: The proportion of p is approximately normal. The