Statistics

posted by .

In a study that was highly published doctors discovered that aspirin helps prevent heart attacks. The research project which was scheduled to last 5 years employed 22,000 american physicians (all male). Half took an aspirin tablet 3 times a week while the other half took a placebo on the same schedule. After 3 years researchers determined that 104 of those who took aspirin and 189 of those who took placebo had heart attacks. Do the results indicate that aspirin is effective in reducing the incidence of heart attacks? Provide the test statistic and the critical value.

You might be able to use a proportional formula for a 2-sample z-test. Find the critical value using a z-table. Once you calculate the test statistic, compare the test statistic to the critical value. If the test statistic exceeds the critical value, you will reject the null hypothesis and conclude a difference. If the test statistic does not exceed the critical value, you cannot reject the null hypothesis.

I hope these few suggestions will help.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Stats

    In a study that was highly published doctors discovered that aspirin helps prevent heart attacks. The research project which was scheduled to last 5 years employed 22,000 american physicians (all male). Half took an aspirin tablet …
  2. Statistics

    Can somebody please help me get started on this problem?
  3. Social Studies Aspirin Project

    When/ where/ why was Aspirin invented? Who thouht of it?
  4. Statistics

    A survey claims that 9 out of 10 doctors recommend Aspirin for their patients who have children. To test this claim against an alternative that the actual proportion of doctors who would do this is less than the claimed, a random sample …
  5. Chemistry

    Aspirin is a weak acid with a Ka of 3.0x10^-5. Find the pH of a solution by dissolving .65g of aspirin in water and diluting it to 50mL. You can use RCOOH to represent aspirin. Molecular weight of aspirin is 180g/mol
  6. chemistry

    a. What is the molecular weight of aspirin (C9H8O4)?
  7. chemistry

    an aspirin contains .324 g of aspirin. how many pounds of aspirin are in a 500 aspirin of bottle
  8. Chemistry

    Acetylsalicylic acid (C9H8O4) is a monoprotic acid commonly known as "aspirin." A typical aspirin tablet, however, contains only a small amount of the acid. In an experiment to determine its composition, an aspirin tablet was crushed …
  9. statistics

    based on the results below, how would you decribe the relationship between heart attack patients being treated with aspirin and whether or not they live?
  10. chem

    how to find mass of aspirin if I used 0.2845g of the powder(crushed apririn) with 1mL of 6.0 mol/L of Nacl?

More Similar Questions