Statistics

posted by .

According to a survey, 21% of residents in a country over age 25 had earned at least a bachelor's degree. You are performing a study and would like at least 10 people in the study to have earned a bachelor's degree.
a)How many residents of the country do you plan t randomly select? This is 10/0.21 = 48
But I don't get the next part....
b)How many residents of the country do you have to randomly select to have a probability 0.89 that the sample contains at least 10 who have earned a bachelor's degree?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. business

    2. Scaling Study Develop a short questionnaire (five to ten questions) and distribute it to at least ten people. Use at least two different types of questions in the survey. Analyze the responses and comment on the validity and reliability …
  2. Statistics

    1) For each of the following statements, formulate appropriate null and alternative hypotheses. Indicate whether the appropriate test will be one-tailed or two-tailed,then sketch a diagram that shows the approximate location of the …
  3. Statistics

    An investigational drug study is being conducted. The initial screening phase needs to include enough people so that the final (approved) group has at least 10 patients. The probability of a person being approved for the study is .80. …
  4. Math Statistics

    An investigational drug study is being conducted. The initial screening phase needs to include enough people so that the final (approved) group has at least 10 patients. The probability of a person being approved for the study is .80. …
  5. statistics

    Is this a descriptive study or an inferential study. I say descriptive...... The table below shows the average income by age group for residents of a small mid-western town in 2001 based on a sample of 200 individuals from each group. …
  6. statistics

    One hundred employees working in the construction, manufacturing, and various other industries were selected for review of salary information and educational level. The salaries of the one hundred employees were reviewed to determine …
  7. statistics

    Pre study scores versus post-study scores for a class of 120 college freshman english students were considerated. The residual plot for the least squares regression line showed no pattern. The least square regression line was y = 0.2 …
  8. Math

    According to one study, 61% of the population swallow at least one spider per year in their sleep. Based on this study, what is the probability that exactly 7 of 10 randomly selected people have swallowed at least one spider in their …
  9. Math: please help

    According to one study, 61% of the population swallow at least one spider per year in their sleep. Based on this study, what is the probability that exactly 7 of 10 randomly selected people have swallowed at least one spider in their …
  10. Statistics Homework

    Statistics Question: Years to Earn Bachelor's Degree Years to Earn Bachelor's Degree: Listed below are the lengths of time (in years) it took for a random sample of college students to earn bachelor's degrees (based on data from the …

More Similar Questions