Tompkins Associates reports that the mean clear height for a Class A warehouse in the United States is 22 feet. Suppose clear heights are normally distributed and that the standard deviation is 4 feet. A Class A warehouse in the United States is randomly selected. (a) What is the probability that the clear height is greater than 16 feet? (b) What is the probability that the clear height is less than 11 feet? (c) What is the probability that the clear height is between 24 and 31 feet? (Round the values of z to 2 decimal places. Round your answers to 4 decimal […]
developer
A politician is urging tighter restrictions on drivers’ licenses issued to teens. He claims that “in one of every five auto accidents a teenager is…
A politician is urging tighter restrictions on drivers’ licenses issued to teens. He claims that “in one of every five auto accidents a teenager is behind the wheel.” You decide to do a little research and find 67 records of car accidents over the past few months. Only nine of the accidents had a teenager behind the wheel. Assume that we can consider these 67 accidents as a random sample of all accidents. If the politician is correct, what is the chance that you would observe 9 or fewer accidents with a teenager behind the wheel?A.0.0524
Hi, I am really struggling on this AP Stats final exam. Here are the questions I am struggling with: Consider the lengths of alligators to be { 18.7,…
Hi, I am really struggling on this AP Stats final exam…. Here are the questions I am struggling with: Consider the lengths of alligators to be { 18.7, 12.3, 18.6, 16.4, 15.7, 18.3, 15.8, 14.9, 17.6, 16.4, 16.7, 17.8, 16.2, 13.8, 15.2, 14.7, 13.2, 15.8, 14.6, 16.6, 16.2, 18.1, 17.5, 17.3 }. According to the Empirical Rule, 68% of the data should fall between what two numbers?
A random sample of 91 customers, who visited a department store, spent an average of $ 74 at this store. Suppose the standard deviation of…
= $ 22. The 98% confidence interval for the population mean (rounded to two decimal places) is: The lower limit is $ The upper limit is $
Suppose you manage a plant that purifies its liquid waste and discharges the water into a local river.
Suppose you manage a plant that purifies its liquid waste and discharges the water into a local river. An EPA inspector has collected water specimens of the discharge of your plant and also water specimens in the river upstream from your plant. Each water specimen is divided into five parts, the bacteria count is read on each, and the mean count for each specimen is reported. The average bacteria counts for each of six specimens are reported in the following table. (a)Please test, at the significance level of 0.05, whether the mean bacteria count for the plant discharge exceeds that […]
