Statistics

posted by .

A private medical clinic wants to estimate the true mean annual income of its patients. The clinic needs to be within $100 of the true mean. The clinic estimates that the true population standard deviation is around $2,100. If the confidence level is 95%, find the required sample size in order to meet the desired accuracy.

  • Statistics -

    Use a formula to find sample size.

    Here is one:
    n = [(z-value * sd)/E]^2
    ...where n = sample size, z-value will be 1.96 using a z-table to represent the 95% confidence interval, sd = 2100, E = 100, ^2 means squared, and * means to multiply.

    Plug the values into the formula and finish the calculation. Round your answer to the next highest whole number.

    Hope this helps.

  • Statistics -

    A population is normally distributed with mean 26.8 and standard deviation 2.5. Find p( 26.8 < x < 29.3 ). (Round your answer to FOUR decimal places.)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. statistics

    Annual household incomes in a certain region have a distribution that is skewed right, with mean 30.25 thousand dollars and a standard deviation of 4.50 thousand dollars. If a random sample of 100 households is taken, then the probability …
  2. Statistics

    A new screening test for a disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% (240) and 70%, (280) respectively. Four hundred (400) people are screened at a clinic during …
  3. Statistics

    A private medical clinic wants to estimate the true mean annual income of its patients. The clinic needs to be within $500 of the true mean. The clinic estimates that the true population standard deviation is around $2,300. If the …
  4. Statistics

    A pharmaceutical company claims its new medication relieves painful symptoms caused by tension headaches within 15 minutes. To investigate this claim, a local health clinic conducts a study of 45 patients who suffer from chronic tension …
  5. statistics

    An economist wants to estimate the mean income for the first year of work for college graduates who majored in biology. How many such incomes must be found if the economist wants to be 95% confident that the sample mean is within $500 …
  6. Statistics

    community physicians clinic is a large clinic with 85 physicians. they treat about 8,600 patients each week. coders are expected to code 100 clinic records each day. how many Full Time Employees are needed to code these records?
  7. Statistic

    Community physician's clinic is buying the medical center physician's clinic. they will be adding 24 physicians who treat 62,400 patients per year. There are no credentialed coders employed at medicla center physician's clinic.The …
  8. Statistics

    An IQ test is designed so that the mean is 100 and the standard deviation is 19 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with …
  9. statistics

    An IQ is designed so that the mean is 100 and the standard deviation is 23 for the population of Normal adults, find the sample size necessary to estimate the mean IQ score of statistics students Such that it can be said with 90% confidence …
  10. Statistics

    The Tyco Video Game Corporation finds that it is losing income because of slugs used in its video games. The machines must be adjusted to accept coins only if they fall within set limits. In order to set hose limits, the mean weight …

More Similar Questions