statistics

posted by .

a survey is to be conducted to determine the proportion of U.S. voters who support additional aid to African nations to fight poverty and HIV/AIDS. Of the proposed sammple sizes which is the smallest that will guarantee a margin of error of no more than 4% for a 90% confidence level?
a)225
b)325
c)425
d)525
e)625

  • statistics -

    Formula:

    n = [(z-value) * p * q]/E^2
    ...where n is the sample size you seek, z-value is obtained using a z-table for the confidence interval (90%) in the problem, p and q represent proportions, E is the maximum error, and ^2 means squared.

    Substituting values:
    n = [(1.645) * .5 * .5]/.04^2
    ...where 1.645 represents the 90% confidence interval, .5 represents p if no value is stated, q = 1 - p = 1 -.5 = .5, .04 is 4% in decimal form and represents the maximum error of estimate for a proportion.

    Calculate and choose the closest answer. There may be differences in the answer due to methods used.

    I hope this will help.

  • statistics -

    525

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Story-Making

    For Health, we have to do a report on AIDS/HIV, we can do anything we want as long as it explains what AIDS/HIV is. I wanted to do a fictional story about it. What type of storyline should I do and where can I find info for AIDS/HIV.
  2. HCA 240

    I need help with this assignment about HIV/AIDS: An Overview its due sunday. I have to compose a 1,300 to 1,450 word paper in APA format. I have to explain the difference between HIV and AIDS, Descride various ways HIV can be transmitted, …
  3. statistics

    A pollster conducts a survey of a random sample of voters in a community to estimate the proportion who support a measure on public health insurance. Let P be the proportion of the population who support the measure. The pollster takes …
  4. algebra

    A poll estimates that 43% of likely voters are in favor of additional restrictions on teenage drivers. The poll has a margin of error of plus or minus 4%. Write and solve an absolute value equation to find the minimum and maximum percent …
  5. socials

    make list for & aganist proposal to increase amount of aid canada give to countries developing for: help improve conditions of poor childrens education decrease poverty against: no guarantee if aid be helpful it may be used for military …
  6. hiv/aids management)

    discussthe history of hiv/aids,and development and the spread of hiv/aids virus global
  7. population,poverty and human development(hiv/aids

    "the larger a population,the higher the levels of poverty'.Do you agree with statement?
  8. Statistics

    In a survey, 55% of the voters support a particular referendum. If 30 voters are chosen at random, find the standard deviation of the number of voters who support the referendum.
  9. HIV and AIDS

    The cure for HIV and AIDS is: a. unknown b. HIV vaccines c. drug "cocktails" d. antibiotics
  10. damon-steve- help statistics

    Statistics City XYZ has 8800 registered voters. There are two candidates: Peter and Paul. A poll of 600 randomly selected registered voters was conducted. We know that 331 said they'd vote for Peter and 251 said they'd vote for Paul. …

More Similar Questions