# 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 35 blended fuels are tested in a lab to ascertain the bio/total carbon ratio.

(a) If the true mean is .9480 with a standard deviation of 0.0060, within what interval - will 95 percent of the sample means fall?

(b) What is the sampling distribution of X-bar? In other - words, state the shape, center, and variability of the distribution of X-bar.

(c) What theorem did you use to answer part (b)?

(a) If the true mean is .9480 with a standard deviation of 0.0060, within what interval - will 95 percent of the sample means fall?

(b) What is the sampling distribution of X-bar? In other - words, state the shape, center, and variability of the distribution of X-bar.

(c) What theorem did you use to answer part (b)?

## Answer to relevant Questions

Noodles & Company wants to estimate the percent of customers who order dessert, with 95 percent confidence and an error of ±10%. What is the required sample size? A "teen ethics poll" was commissioned by Junior Achievement and Deloitte. The survey by Harris Interactive surveyed 787 students aged 1318. (a) Assuming that this was a random sample of all students in this age group, find ...To determine the proportion of taxpayers who prefer ling tax returns electronically, a survey of 600 taxpayers was conducted. Calculate the margin of error used to estimate this proportion. What assumptions are required to ...A certain brand of at white interior latex paint claims one-coat coverage of 400 square feet per gallon. The standard deviation is known to be 20. A sample of 16 gallons is tested. (a) At α = .05 in a left-tailed test, find ...GreenBeam Ltd. claims that its compact fluorescent bulbs average no more than 3.50 mg of mercury. A sample of 25 bulbs shows a mean of 3.59 mg of mercury. (a) Write the hypotheses for a right-tailed test, using GreenBeam's ...Post your question

0