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Category > Statistics Posted 28 May 2017 My Price 5.00

A Phoenix Wealth Management/Harris Interactive survey of 1500 individuals with net worth of $1

A Phoenix Wealth Management/Harris Interactive survey of 1500 individuals with net worth of $1 million or more provided a variety of statistics on wealthy people (Business Week, September 22, 2003). The previous three-year period had been bad for the stock market, which motivated some of the questions asked.

a. The survey reported that 53% of the respondents lost 25% or more of their portfolio value over the past three years. Develop a 95% confidence interval for the proportion of wealthy people who lost 25% or more of their portfolio value over the past three years (to 4 decimals).

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b. The survey reported that 31% of the respondents feel they have to save more for retirement to make up for what they lost. Develop a 95% confidence interval for the population proportion (to 4 decimals).

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c. Five percent of the respondents gave $25,000 or more to charity over the previous year. Develop a 95% confidence interval for the proportion who gave $25,000 or more to charity (to 3 decimals).

 

 

Answers

Alpha Geek
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Status NEW Posted 28 May 2017 08:05 AM My Price 5.00

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file 1495959042-Answer.docx preview (191 words )
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