Our t-test lab analyzes the ELA (English Language Assessment) of primary school students (grades 3-8) from 2013-2017. To
Posted: Tue Nov 23, 2021 9:20 am
Our t-test lab analyzes the ELA (English Language Assessment) of primary school students (grades 3-8) from 2013-2017. Today we will be focused mainly on looking at gender and ELA scores. Current reports for elementary education report that girls are performing better than boys at school. Does this hold water?
Run a student t-test (parametric) and a Mann-Whitney (non-parametric) t-test. Describe the results found.
Copy and paste the Q-Q plot, which areas our data is not reflective of a normal curve? Looking at the dataset, is this representative of a sampling error?
(c) Copy the descriptives plot and commentate on the mean and medians. Is there a skewness? If so, which group? What does that skewness mean for that group?
Independent Samples T-Test Statistic df р Mean difference SE difference Effect Size 348 0.906 113 5926 <.001 <.001 103 10.0 Cohen's d Rank biserial correlation 1.21 0.613 Mean Scale Score Student's Mann-Whitney U Note. Ho Female Male Group Descriptives Group N Mean Median SD SE Mean Scale Score Female Male 175 175 306 296 307 298 8.54 8.42 0.645 0.636
Mean Scale Score 305 Mean Scale Score Mean (95% CI) Median 300 295 Female Male Category N Standardized Residuals 0 Theoretical Quantiles
Run a student t-test (parametric) and a Mann-Whitney (non-parametric) t-test. Describe the results found.
Copy and paste the Q-Q plot, which areas our data is not reflective of a normal curve? Looking at the dataset, is this representative of a sampling error?
(c) Copy the descriptives plot and commentate on the mean and medians. Is there a skewness? If so, which group? What does that skewness mean for that group?
Independent Samples T-Test Statistic df р Mean difference SE difference Effect Size 348 0.906 113 5926 <.001 <.001 103 10.0 Cohen's d Rank biserial correlation 1.21 0.613 Mean Scale Score Student's Mann-Whitney U Note. Ho Female Male Group Descriptives Group N Mean Median SD SE Mean Scale Score Female Male 175 175 306 296 307 298 8.54 8.42 0.645 0.636
Mean Scale Score 305 Mean Scale Score Mean (95% CI) Median 300 295 Female Male Category N Standardized Residuals 0 Theoretical Quantiles