John wants to see if the kids in his AP classes have a highe…

John wants to see if the kids in his AP classes have a higher IQ after studying for the IQ test with some new lessons he designed.  He takes a sample of 6 students prior to the study material and find the following IQ’s: 98, 105, 103, 110, 106. After the lessons are concluded he retests the students and find the following IQ’s (respectively): 100, 106, 102, 114, 108 At the 10% significance level, is there evidence that the lessons raised scores on the IQ test?   Q1: This is a [twosample] [means] Q2: What distribution will you use? [t] Q3: What is the conclusion? [conclusion] meaning [conclusion2] Q4: If the truth is that the program raises scores on the IQ test, what error was made? [error]  

Read instructions for entering answers carefully.  Previous…

Read instructions for entering answers carefully.  Previous studies have indicated that approx. 40% of college students work full time.  Joanna thinks that this is higher amongst college students at 2 year community colleges. She took an SRS of 140 college students from the local community college and found that 65 worked full time. Is this sufficient evidence (at the 5% significance level) to support the claim that more than 40% of community college students work full time?   Q1: Fill in the hypothesis.  Null Hypothesis: H0: p =[forty] Alternate hypothesis: Ha: p =[forty2]   Q2:Assuming the null hypothesis is true, the sampling distribution for sample proportions is N([forty3],[sd]) Write both as decimals. Round the standard deviation to 4 decimal places.   Q3: Find the rejection region: Round to 2 decimal places The rejection region on the standard normal curve is ([ll],

IQ scores for Americans are normally distributed with a mean…

IQ scores for Americans are normally distributed with a mean of 100 and a standard deviation of 15 John believes the kids in his AP classes have a higher IQ then the average American (100).  He takes a sample of 6 students and find the following IQ’s: 98, 105, 103, 110, 106. Assuming that the population of honors students have the same standard deviation of scores (100) answer the following for a significance test at 5% significance level   A: This is a [onesample] [means] test B: This is a [rightsided] test C: Which distribution will you use? [Z] D: What is the test statistic? [TS] E: What is the p-value? [p-value] F: What is the conclusion? [conclusion] G: If honors students IQ’s have a true average of 100, what type of error was made? [error]