statistics

posted by .

According to a survey 35% of adults are against using animals for research. Assume that this result holds true for the current population of all adullts. Let X be the number of adults who are against using animals for research in a random sample of 2 adults.
Find the probability distribution of X

  • statistics -

    P(0) (the probability none are against) = (0.65)^2 = 0.4225
    P(1) = 2*(0.65)(0.35) = 0.4550
    P(2) (both against) = 0.1225

    The sum is 1.00

    The "expectation value" (the average of many trials) is 0.70

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Statistics

    Looking for someone to verify my homework answers on identifying the sample and population...... 1) A group of 50,000 randomly selected adults were survey about whether they drink at least 6 - 8 oz glasses of water each day. Only 35% …
  2. math

    The expression 9a + 6s is the cost for a adults and s students to see a musical performance. a. Find the total cost for three adults and five students. b. The number of adults and students in a group both double. Does the cost double?
  3. statistics

    A Gallup Poll asked, "In general, how often do you experience stress in your daily life - never, rarely, sometimes, or frequently?
  4. statistics

    assume adults have an IQ score that are normally distrubted with a mean of 105 and standard deviation of 20 A) find the percentage of adults that have an IQ between 94 and 116 B) find the percentage of adults IQ exceeding 120 C)Determine …
  5. statistics

    Us travel data center survey of 1500 adults found that 42% of respondents stated that they favor historical sites. Find the 95% confidence interval of the true proportion of all adults who favor visiting historical sites.
  6. putting it all together

    children can be best described as ? a.mini-adults b.proto-adults c.diminished adults d.adults -in- waiting my answer is a
  7. biology honors

    i am doing a research paper on animal rights what are some specific issues related to the topic and develop a specific research question from your selected contemporary issue. ( i put "animals used as experiments") my thesis is animals …
  8. Statistics

    One of the questions in the Pew Internet & American Life Project asked adults if they used the Internet, at least occasionally. The results showed that 454 out of 478 adults aged 18 - 29 answered yes; 741 out of 833 adults aged 30 …
  9. Statistics

    According to one survey, the mean serum cholesterol level for U.S. adults was 195.1, with a standard deviation of 41.5. A simple random sample of 95 adults is chosen. Find the 46 percentile for the sample mean. Write only a number …
  10. statistics

    As a manager for an advertising company, you must plan a campaign designed to increase Twitter usage. A recent survey suggests that 85% of adults know what Twitter is. How many adults should you survey in order to be 90% confident …

More Similar Questions