Question

Concerns about climate change and CO2 reduction have initiated the commercial production of blends of biodiesel (e.g., from renewable sources) and petrodiesel (from fossil fuel). Random samples of 32 blended fuels are tested in a lab to ascertain the bio/total carbon ratio (a) If the true mean is.9370 with a standard deviation of 0090, within what interval will 99 percent of the sample means fall? (Round your answers to 4 decimal places.) The interval is from to (b) If the true mean is 9370 with a standard deviation of.0090, what is the sampling distribution of X? 1 Exactly normal with μ-0.937 and σ-0.009 Approximately normal with :0937 and 0.009 3 Exactly normal with :0937 and ơ,-0.009 / V32. 4 Approximately normal with u 0.937 and 0.009/y32

Answer 1