(a) Using the .05 level, what should the researcher conclude? Solve this problem
ID: 2957366 • Letter: #
Question
(a) Using the .05 level, what should the researcher conclude? Solve this problem explicitly using all five steps of hypothesis testing and illustrate your answer with a sketch showing that compares and distribution, cut off or caught off and the score of the sample of this distribution (b) then explain your answer to someone who has never had a course in statistics but who is familiar with mean, standard deviation, and Z scores.Explanation / Answer
Number 16: Part a): H0: mean = 18 Ha: mean > 18 The critical z value is 1.6449, from a table. Get the z score: Z = (38-18)/6 = 3.33333 The z value is well above the critical value, so we reject the null hypothesis and conclude that the rats do worse with the sound. Part b) The first thing we did was create hypotheses that we try to prove or not prove. Then we determined the Z value, using a table, for which 95% of the values lie below. Next, we calculated the z score for the particular rat in question. Since it was above the cutoff z score, we decided that it was an "outlier", so the effect of the sound was real. I hope it helps.
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