Reducing the margin of error by half

Assignment Help Basic Statistics

Reference no: EM1387695

An exit survey of 500 voters revealed that 210 of them favor a particular referendum issue.

i. Find the 90%, 95% and 99% confidence intervals for the proportion of all voters who favor the issue.

ii. How many more voters should we include in the sample if we need to reduce the margin of error by half?

Reference no: EM1387695

Questions Cloud

Variance and standard deviation mean : Compute the mode, median and mean for the college students and compute the mode, median and mean for the parents' data

Coefficient of determination : Would it be appropriate to say the coefficient of determination (R-squared) is the proportion of variation in Y due to the variation within each of the categories of X?

Determine genetic material in the organism : Suppose that you have just discovered a new pathogen whose genome contains 29.1 percent A, 22.3% T, 25.8% C, and 22.8% G based on the relative molar concentrations of each nitrogenous base.

Ebbie is upset by the fact that his professor apparently : Debbie is upset by the fact that his professor apparently discounts the value of experience in managing people, and she cannot see how a conceptual framework that some professor dreamed up can help her manage people better.

Reducing the margin of error by half : Find the 90%, 95% and 99% confidence intervals for the proportion of all voters who favor the issue. How many more voters should we include in the sample if we need to reduce the margin of error by half?

Define what is meant by high-performance organizations : Define what is meant by High-Performance Organizations (HPOs) and describe them in terms of their five key components.

Determine gene frequency for the flight alleles : Think about a population of owls. For simplification purposes let's say that an owl's flight can be loud or silent and is a function of classic Mendelian genetics.

Calculating your test statistic : Using a significance level of 0.05, perform a hypothesis test to see if the workers are right, and you need to hire more help. Write your hypotheses, calculate your test statistic and decide whether or not to reject your null.

Explain herzberg''s motivation theory : Explain Herzberg's motivation theory and discuss how a manager, using his/her knowledge of this theory, might approach resolving a situation in which an employee is obviously dissatisfied

User Account

All Pages