13. -1 points MntroStat9 S.E.094 My Notes Ask Your Oocs delaying oral practice h

Question

13. -1 points MntroStat9 S.E.094 My Notes Ask Your Oocs delaying oral practice hinder learning a foreign languag? Rescarchers randomly assigned 18 beginning students of Russian to begin speaking practice immediately and another 18 to delay speaking for 4 weeka. At the end of the scmester both groups tooka standard test of comprehensicn of spoken Russian. Suppose that in the population of all beginning students, the test scores for early speaking vary according to the N(31, 4) distribution and scores for delayed speaking have the N(29, 5) distribution (a) What is the sampling distribution of the mean score x in the early speaking group in many repetitions of the expermek? (Round your answers for s to two decimal places.) Mean . What is the sampling distribution of the meen score y in the delayed speaking group? Mean (b) If the experiment were repeated many times, what would be the sampling distribution of the difference y x between the mean scores in the two groupa? (Round your answer fors to two decimal places.) Mean (c) What is the prabability that the experiment will find (misleadingly) that the maan score for delayed spealing is at least as large as that for early speaking? (Round your answar to four decimal places.) Submit Answar Save ProgressPracc Anothar Version

Explanation / Answer

Following is the answer to your question

N(µ, ).

a) Mean = 31

s=4

Mean = 29

s=5

b)Mean =2

s=6.40

c)P(µ2>=µ1) = 0.57

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