Question

Concerns about climate change and CO2reduction have initiated the commercial production of blends of biodiesel (e.g., from renewable sources) and petro diesel (from fossil fuel). Random samples of 38 blended fuels are tested in a lab to ascertain the bio/total carbon ratio.

(a)If the true mean is .9350 with a standard deviation of 0.0090, within what interval will 90 percent of the sample means fall?(Round your answers to 4 decimal places.)

The interval is from_________ to_________