Stats Quiz 2E - Stat 119 Quiz 2E section 24 Name Red id l(l...

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

View Full Document Right Arrow Icon
Image of page 1

Info iconThis 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.

Unformatted text preview: Stat 119 Quiz 2E section 24 Name: Red id: l. (l point)_An athlete completed an BOO-m race in 140 seconds. The distribution of BOO-n1 race times foilowed a belt curve. with mean 150 seconds and standard deviation 6. The same athlete aiso competed in a swim. finishing in 10.25 minutes. The distribution of swim times also foilowed a beli curve, with mean 12 minutes and standard deviation 1.5 minutes. In which event does the athlete have. a better standing relative to the other competitors in the event? A. The SOC—m race because that has the higher z~score. % W ggfig m g g3 mam é B The swim because that has the higher z—score f see “W “W @ The SOB—m race because that has the lower z~score é . The swim because that has the lower z—score we 9 We .3: W is 3%» %Ss.ii;e w f3} Answer: 2. (1 point) When the points in a normai probabiiity plot {alt along a straight tine, we infer that the population distribution is: A. srnali B. nonwnormal C. uniform normal Answer 3. {1 point) A Z~score oi" 2 means A. The observation is 2 standard deviations smalEer than the mean The observation is 2 standard deviations target than the mean . The observation is twice larger than the mean D. The difference between the observation vaiue and the mean is 2 Answer: Use the fa owmg information to answer questions 4-6 Statistics exam scores foliow an approximately normal distribution with a mean of 70 points and a standard deviation of 8 points. 4. (2 points) If a student has a Z~score of —E .5. what was the student’s actuai exam score? (show work) W E a S g: \X “36$ w t: x W Answer: 3‘ X “7.3%” film" 5. (i point} Use the empirical rule to estimate the percentage of statistics exam scores that a between 6?. and 94 A. 68% B. 8} 5% C. 97.5 D. 83.85% 13.95% fie «i n%: m a Sp 3% é fig 6. (2 points) For the distribution of statistics exam scores. what is the value of the 84Eh percentiie? Answer: 7. (3 points) In a 2002 study. the Accreditation Council t" or Graduate Medical Education found that medical residents‘ mean number of hours worked in a week is 81.7. Suppose the number of hours werked per week by medical residents is approximately normal. Find the standard deviation of hours worked in a week if 4% of the medical residents work more than 90 hours per week. We Wet Answer: 5% g? Use the following information to answer problems 840 Suppose that the height of at] basketball players in National Basketbail Association is normally distributed with mean 80 inches and standard deviation of 5 inches. 8. ('3 points) What is the probability that a randomly selected player has a height of more than 82 W? e; a rim 5 § 395%“? cram} Answer: E “3;: §* § 9. (4 points) Determine the two heights that represent the middte 90% of the distribution of basketbail piayer heights. Knew Lse§§§§ «arse :2: Mamet” 5a,“ assertstam; seize? w W Answer: é 3 gygé 10. (3 points) What is the. mine of the third quartiie of this distribution? X: tegeifi x $§~3§ Answer: KW“ ...
View Full 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