Interval and the associated confidence level

Reference no: EM131821070

After the 2010 earthquake in Haiti, many charitable organizations conducted fundraising campaigns to raise money for emergency relief. Some of these campaigns allowed people to donate by sending a text message using a cell phone to have the donated amount added to their cell-phone bill. The report "Early Signals on Mobile Philanthropy: Is Haiti the Tipping Point?" (Edge Research, 2010) describes the results of a national survey of 1526 people that investigated the ways in which people made donations to the Haiti relief effort. The report states that 17% of Gen Y respondents (those born between 1980 and 1988) and 14% of Gen X respondents (those born between 1968 and 1979) said that they had made a donation to the Haiti relief effort via text message. The percentage making a donation via text message was much lower for older respondents. The report did not say how many respondents were in the Gen Y and Gen X samples, but for purposes of this exercise, suppose that both sample sizes were 400 and that it is reasonable to regard the samples as representative of the Gen Y and Gen X populations.

a. Is there convincing evidence that the proportion of those in Gen Y who donated to Haiti relief via text message is greater than the proportion for Gen X?

b. Estimate the difference between the proportion of Gen Y and the proportion of Gen X that made a donation via text message using a 99% confidence interval. Provide an interpretation of both the interval and the associated confidence level.

Reference no: EM131821070

Questions Cloud

Discuss the impact of industrialization on meiji japan : Discuss the impact of industrialization on Meiji Japan? Discuss the role/function of propaganda in World War One

Explain firms long term and short term marketing strategies : Set up a Cafe, and come out with ideas on how are we gonna attract people and create awareness to increase the sales.

Adolescents and mp3 players : The authors of the paper "Adolescents and MP3 Players: Too Many Risks, Too Few Precautions" (Pediatreics [2009]: e953-e958) concluded that more boys

How does the required rate of return affect the NPV : Effect of Required Rate Blanchard Company has an opportunity to invest $15,000 in a new automated lathe that will reduce annual operating costs by $2,300.

Interval and the associated confidence level : Estimate the difference between the proportion of Gen Y and the proportion of Gen X that made a donation via text message using a 99% confidence interval.

What was the importance of the battles of the sexes : What was the importance of the Battles of the Sexes and what was the outcome? Why was pregnancy such a concern to women in the 1960s

How do you define a successful project : 1) How do you define a successful project? 2) What will your, the facility manager's, role be in a project?

Prepare budgeted income statements for each of the months : Prepare budgeted income statements for each of the months of January and February that show the expected results from implementing the proposed changes

Describe in detail the training process : Describe in detail the training process. What is training? What is training's strategic context? Discuss and include performance management.

User Account

All Pages