Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

askme12345

  • 4 years ago

Can someone explain these please. Its statistics

  • This Question is Closed
  1. askme12345
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    1. The Aid to Families with Dependent Children (AFDC) program has an overall error rate of 4% in determining eligibility. The state of California uses sampling to monitor its counties to see whether they exceed the 4% error rate, which can result in economic sanctions. In one county, 9 cases out of 150 were found to be in error. (a) Find a 95% confidence interval for the error rate for the county (proportion of all cases in error). (b) In 1982 the California legislature mandated that a 95% confidence interval be used in studying error rate. Based on your answer in part (a), would you conclude that the error rate for the county is above the 4% rate? 2. To estimate the proportion p of passengers who had purchased tickets for more than $400 over a year's time, an airline official obtained a random sample of 75. The number of those purchasing tickets for more than $400 was 45. (a) What is a point estimate for p? (b) Find a 90% confidence interval for p.

  2. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ow!! zarkon is good at these

  3. amistre64
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    its been to long for me to place it all

  4. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy