Question 40 (4 points) For all hypothesis tests, one must (a) indicate H, and H,, (b) interpret whether to reject Ho or not reject Ho, and (c) indicate the effect size or explained variance. A sample of 12 packets of peas of 400 g format is taken and the contents are weighed. Assess the assumption that the average net weight of all packages is 400g. Set a to 0.05. Single sample statistics Mean error IN Mean Standard deviation standard then 12 398,08 14782 514 Single sample test Test value 400 95% confidence interval of Signification the difference Average t df p unilateral p bilateral difference Lower Superior then -3.727 11 .002 .003 -1.917 -3.05 -.78 Single Sample Effect Sizes It is standardized 95% Confidence Interval Point Rating: Lower Superior then d of Cohen: 1.782 -1.076 -1.780 - 342 Correction the Hedges 1.916 -1.000 -1.655 -318 has. Denominator used to estimate effect sizes. Cohen's d uses the sample standard deviation. Hedges correction uses the sample standard deviation plus a correction factor