Concerns about climate change and CO, reduction have Initlated the commerclal production of blends of blodlesel (e.g., from renewable sources) and petrodlesel (from fossil fuel). Random samples of 48...

Extracted text: Concerns about climate change and CO, reduction have Initlated the commerclal production of blends of blodlesel (e.g., from renewable sources) and petrodlesel (from fossil fuel). Random samples of 48 blended fuels are tested In a lab to ascertaln the blo/total carbon ratlo. (a) If the true mean Is .9050 with a standard devlation of 0.0100, within what Interval will 90 percent of the sample means fall? (Round your answers to 4 decimal places.) The interval is from to (b) If the true mean Is .9050 with a standard devlatlon of 0.0100, what Is the sampling distributlon of X ? 1. Exactly normal with p = 9050 and o = 0.0100. 2 ApproxImately normal with u = .9050 and o = 0.0100. 3. Exactly normal with u = .9050 and o, 4. Approximately normal with u = .9050 and o, 0.0100/V48. 0.0100 /V48. 01 03