The level of dissolved oxygen in a river is an important indicator of the water's ability to support aquatie life. You collect water samples at 15 randomly chosen locations along a stream and measure the dissolved oxygen. Here are your results in milligrams per liter: 4.53 5.04 3.29 5.23 4.13 5.50 4.83 4.40 5.42 6.38 4.01 4.66 2.87 5.73 5.55
Construct and interpret a 95% confidence interval to estimate the mean dissolved oxygen level in this stream