{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

hw5solu_STAT515Fall2011

hw5solu_STAT515Fall2011 - Solution to Homework 5(STAT515...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Solution to Homework 5 (STAT515, Fall 2011) 4.60. ( 20 points ) a. ( 5 points ) One needs to assume that the sample of five brands forms an independent sample from a big population of bottled-water brands. Then one can view the experiment, “inspecting these five brands to see if they use tap water”, as an experiment that consists of 5 independent trials. Clearly, the outcome of each trial is either “Yes, this brand uses tap water.” or “No, this brand does not use tap water.” That is, the outcomes of each trial (for each bottle) is dichotomized, like “success” and “failure” in an binomial experiment. Moreover, if it is known that 25% of the population use tap water, then for each trial the probability of “success” is 0.25. Now that this experiment has all the characteristics of a binomial experiment, the random variable, X = the number of brands among the five selected that use tap water, is a binomial random variable.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern