Homework Help: statistics

Posted by pierre on Thursday, November 10, 2011 at 12:16pm.

an industrial designer wants to determinethe average amount of time it takes an adult to assemble an easy-to- assembletoy .use the following data (inminites)a random sample, to construct a 95% confidence interval for the mean of the population sampled:17 13 18 19 17 21 29 22 16 28 21 15 26 23 24 20 8 17 17 21 32 18 25 22 16 10 20 22 19 14 30 22 12 24 28 11

statistics - PsyDAG, Friday, November 11, 2011 at 12:00pm
95% interval = mean ą 1.96 SD

Find the mean first = sum of scores/number of scores

Subtract each of the scores from the mean and square each difference. Find the sum of these squares. Divide that by the number of scores to get variance.

Standard deviation = square root of variance

I'll let you do the calculations.

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