A random sample of  12  subjects was asked to perform a given task. The time in seconds it took each of them to complete the task is recorded below. 47 ,  33 ,  42 ,  35 ,  45 ,  30 ,  31 ,  36 ,  25 ,  39 ,  48 ,  38 Send data to calculator  If we assume that the completion times are normally distributed, find a  99%  confidence interval for the true mean completion time for this task. Then find the lower limit and upper limit of the  99%  confidence interval. Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.) Lower limit:   Upper limit:

Question 6 To create a confidence interval from a bootstrap distribution using percentiles, we keep the middle values and chop off some number of the lowest values and the highest values. If our bootstrap distribution contains values for 1000 bootstrap samples, indicate how many we chop off at each end for each confidence level given.Enter the exact answers to all parts.           (a) 95%We should chop off values from each end.   exact number, no tolerance         (b) 85%We should chop off values from each end.   exact number, no tolerance         (c) 98%We should chop off values from each end.   exact number, no tolerance         (d) 99%We should chop off values from each end.   exact number, no tolerance

Question 1 1. Which IAT data set are you working with? 2. 3. Use StatCrunch and your unique IAT sample to estimate the mean age for the population of IAT participants at the 90% confidence level. Copy the contents of your StatCrunch output window and paste them into your response. (No need to type anything here - just copy and paste the contents of your StatCrunch output window.) Are conditions met to estimate the mean age for the population of IAT participants? (Be sure to support your answer as demonstrated throughout Unit 8.) 4. State the confidence interval, and then interpret the confidence interval in context. 5. What is the margin of error (MOE)? 6. Which would be more accurate, the 90% confidence interval you found or an 85% confidence interval? Briefly explain. Which would be more precise? Briefly explain. One sample T confidence interval: μ: Mean of variable 90% confidence interval results: Variable Sample(IAT-Weight-Score) Sample Mean Std. Err. DF L. Limit U. Limit…

The students in the HS3333 course recently took an exam and these were the scores:   76, 88, 67, 80, 44, 65, 50, 98, 55, 45, 23, 44, 65, 78, 66, 56, 89, 76,87,29     What score is the 75% percentile? (Show work.) What score is the 90% percentile? (Show work.) A score of 55 is what percentile? (Show work.)