This week you will submit Phase 5, the final phase, of your course project. For Phase 5 of your course project, you will want to review your instructor’s feedback from your Phase 4 submission and make any necessary corrections. Remember if you have questions about the feedback to ask your instructor for assistance.
Once you have made your corrections, you will make your final submission for the course project. Below is a summary of the expectations for Phase 5 of the course project:
Feedback from Instructor; Phase 1, standard deviation is incorrect, s = sqrt(variance); double check, Phase 2: Your confidence intervals were incorrect;
The CI = x-bar +/- t * s / sqrt (n), but technically, you should use t instead of z; Phase 3: Your test statistic was incorrect, t = (xbar – mu) / [s/sqrt(n)]; from phase 1, the mean should have been 61.8 and s=8.92;
The phrasing of the final conclusion was too strong; awkward.
This whole exercise was just like example #4 in the Mod 3 course materials – Hypothesis Testing Explained and Explored; Phase 4: Phase 2 confidence intervals are still incorrect;
x */ z* s/√60, should be xbar ± t * s/√60
You have already identified 61.8 as the mean, so where did 61.3334 come from?
t is not 1.8167, check a t-table with 59 degrees of freedom and two tails at .05 (.025 in each).
Too many inconsistencies in phase 3 too
Therefore t=(65-62.82)(8.3/√60)=, what is 62.82? you identified the sample mean already as 61.8? What is 8.3? You already know s is 8.92?
Clean this up.
Please be sure to show all of your work and use the Equation Editor to format your equations.
This assignment should be formatted using APA guidelines and a minimum of 2 pages in length.
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