Two thousand brown trout are introduced into a small lake. The lake has a volume of 20,000 cubic meters. Use the Poisson table to find the probability that 3 brown trout are found in any given cubic meter. (a) Find the average number of brown trout per cubic meter.
(b) Identify μ and x.
(c) Use the Poisson table in Appendix B
(d) Determine whether the event is unusual.

Do more republicans (group a) than democrats (group b) favor a bill to make it easier for someone to own a firearm? two hundred republicans and two hundred democrats were asked if they favored a bill that made it easier for someone to own a firearm. how would we write the alternative hypothesis?

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?

If the altitude is drawn to the hypotenuse of a right triangle, then the two triangles formed are similar to the original triangle and to each other. which set of triangles shows the similar triangles created by the altitude in the diagram?