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The Population Variance and Standard Deviation - Speech or Presentation Example

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In the paper “The Population Variance and Standard Deviation” the author analyzes the population variance and standard deviation for the percentage rate of home ownership with 99% confidence. The percentage rates of home ownership were taken for 8 randomly selected states…
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The Population Variance and Standard Deviation
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"The Population Variance and Standard Deviation"

Download file to see previous pages The standard deviation of the sample was 4.1 million. Find the 95% confidence interval of the true mean.
 12. It has been reported that 20.4% of incoming freshmen indicate that they will major in business or a related field. A random sample of 400 incoming college freshmen was asked their preference, and 95 replied they were considering business major. Estimate the true proportion of freshmen business majors with 98% confidence. Does your interval contain 20.4?
 16. A recent study indicated that 29% of the 100 women over age 55 in the study were widows. How large a sample must you take to be 90% confident that the estimate is within 0.05 of the true proportion of women over age 55 who are widows?
 8. Find the 90% confidence interval for the variance and standard deviation of seniors at Oak Park College if a sample of 24 students has a standard deviation of 2.4 years and the variable is normally distributed. What would be the 95% confidence interval?
 12. The percentage rates of home ownership for 8 randomly selected states are listed below. Estimate the population variance and standard deviation for the percentage rate of home ownership. ...Download file to see next pagesRead More
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