Find the proportion of people using nicotine gum

Reference no: EM131795432

Nicotine Gum

A study used nicotine gum to help people quit smoking. The study was placebo-controlled, randomized, and double-blind. Each participant was interviewed after 28 days, and success was defined as being abstinent from cigarettes for 28 days.

The results showed that 174 out of 1649 people using the nicotine gum succeeded, and 66 out of 1648 using the placebo succeeded. Although the sample was not random, the assignment to groups was randomized.

(Source: Shiffman et al., Quitting by gradual smoking reduction using nicotine gum: A randomized controlled trial, American Journal of Preventive Medicine, vol. 36, issue 2, February, 2009)

a. Find the proportion of people using nicotine gum that stopped smoking and the proportion of people using the placebo that stopped smoking, and compare them. Is this what the researchers had expected?

b. Find the observed value of the test statistic, assuming that the conditions for a two-proportion z-test hold.

Reference no: EM131795432

Questions Cloud

Identifying the influences of customer satisfaction : What methods are most effective in identifying the influences of customer satisfaction, given that some aspects of service may be unconsciously experienced.

Calculate the book value of the ovens at end of third year : Calculate the book value of the ovens at the end of the third year. What is the gain or loss on the sale of the ovens at the end of the third year?

Economic value of new assessment tool in recruiting efforts : The Head of your department has tasked you with determining the economic value of a new assessment tool in recruiting efforts.

Financial results for apple including annual revenues : Report the most recent (last 5 years of data) financial results for Apple including annual revenues, annual after tax earnings, year-end stock prices and trends

Find the proportion of people using nicotine gum : Find the proportion of people using nicotine gum that stopped smoking and the proportion of people using the placebo that stopped smoking.

Identify tools use in conducting monetary policy : There are several tools that the Federal Reserve can use in conducting monetary policy Identify three of these major tools.

Importance to the staffing process : Discuss the meaning of each of each concept and its importance to the staffing process.

Prepare an incremental analysis for the special order : Cost of goods sold was 70% variable and 30% fixed. Operating expenses were 60% variable and 40% fixed. Prepare an incremental analysis for the special order

Find the increased chance of survival : Perform a hypothesis test to test whether those who take idel have a better chance of surviving than those taking the placebo.

User Account

All Pages