Use the given information to find the number of degrees of freedom, the critical values x and x%, and the confidence interval estimate of o. It is reasonable to assume that a simple random sample has been selected from a population with a normal distribution. Nicotine in menthol cigarettes 99% confidence; n = 25, s = 0.23 mg. Click the icon to view the table of Chi-Square critical values. df = (Type a whole number.) (Round to three decimal places as needed.) XR = (Round to three decimal places as needed.) The confidence interval estimate of o is mg

You intend to estimate a population mean with a confidence interval. You believe the population to have a normal distribution. Your sample size is 8. While it is an uncommon confidence level, find the critical value that corresponds to a confidence level of 93.5%.

A taxi cab company takes a random sample of 50 of its taxis and notes their miles per gallon (mpg) on a test run. The computer output is shown below. Mean St Dev Min Q1 Q2 Q3 Max 19.78 3.09 13.30 17.80 20.00 21.83 26.00 50% of the taxis have MPG lower than what value? Group of answer choices A. 20 MPG B. (21.83 - 17.80) MPG C. 19.78 MPG D. (26-13.30)/2 MPG

Which confidence interval would lead you to Fail to Reject H0? Group of answer choices Test value: 10 Confidence Interval: 13.1 – 15.1 Test value: 5 Confidence Interval: 5.6 – 6.9 Test value: 5 Confidence Interval: 4.5 – 6.3 Test value: 10 Confidence Interval: 9.2 – 9.8