Suppose Robbie is the educational director for a group of teen test prep programs in Nevada. He knows that the mean scor

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Suppose Robbie Is The Educational Director For A Group Of Teen Test Prep Programs In Nevada He Knows That The Mean Scor 1 (58.11 KiB) Viewed 21 times

Suppose Robbie is the educational director for a group of teen test prep programs in Nevada. He knows that the mean score on Nevada's mathematics exam is 114 points with a standard deviation of 18 points. Robbie thinks the teens in his program score differently than the population mean on Nevada's mathematics exam. To test his claim, he randomly selects 250 of his students and finds the mean test score of the sample to be 117 points. 1) What are Robbie's null (Ho) and alternative (H₁) hypotheses? He: 114 pts and H₁: #114 pts He: 114 pts and H₁: > 114 pts Ho: x= 114 pts and H₁: # 114 pts He: 117 pts and H₁: # # 117 pts ⒸH₂= 117 pts and H₁: > 117 pts What is the 2-statistic? Give your answer precise to two decimal places. Z= 2) What is the positive critical value for a significance level of a = 0.05? Give your answer precise to at least two decimal places. critical z= Based on his results, Robbie should 31 4) reject the null. There is insufficient evidence (P < 0.05) that the mean mathematics score of teens in the test prep program is different from the population mean of 114 points. fail to reject the null. There is insufficient evidence (P>0.05) that the mean mathematics score of teens in the test prep program is different from the population mean of 114 points. reject the null. There is sufficient evidence (P < 0.05) that the mean mathematics score of teens in the test prep program is different from the population mean of 114 points. @fail to reject the null. There is sufficient evidence (P>0.05) that the mean mathematics score of teens in the test prep program is different from the population mean of 114 points. reject the null. There is sufficient evidence (P<0.05) that the mean mathematics score of teens in the test prep program is greater than the population mean of 117 points