Round answers to three decimal places. A random sample of of…
Questions
Rоund аnswers tо three decimаl plаces. A randоm sample of office works participates in a study to compare typing speeds using a standard keyboard versus an ergonomic keyboard. Each worker completed the same typing task—once using a standard keyboard and once using an ergonomic keyboard. For each participant, the order in which they tested the keyboards was randomly determined. The typing speed (in words per minutes) for each person was recorded for both keyboards. The data is summarized below. Difference n mean standard deviation ergonomic - standard 37 7.291 1.725 Determine the 90% confidence interval to estimate the mean difference in typing speeds using the two keyboards: ([lower], [upper]) What is the margin of error for your interval? [b]