The amount of trash generated by US households (in lbs per day) is Normally distributed. You take a sample of 10 people. The sample average is xbar=10.91 lbs, and the sample standard deviation is...

The amount of trash generated by US households (in lbs per day) is Normally distributed. You take a sample of 10 people. The sample average is xbar=10.91 lbs, and the sample standard deviation is s=4.736. What is the margin of error for a 90% Confidence Interval for the mean? (Go to two decimal places.)