Question

Consider the formula used for any confidence interval and the elements included in that formula. What...

Consider the formula used for any confidence interval and the elements included in that formula. What happens to the confidence interval if you increase the confidence level, increase the sample size, or increase the margin of error? Only consider one of these changes at a time. Explain your answer with words and by referencing the formula.

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Consider the formula used for any confidence interval and the elements included in that formula. What...
Consider the formula used for any confidence interval and the elements included in that formula. What happens to the confidence interval if you (a) increase the confidence level, (b) increase the sample size, or (c) increase the margin of error? Only consider one of these changes at a time. Explain your answer with words and by referencing the formula.
The length of a confidence interval changes when either the confidence level changes or the sample...
The length of a confidence interval changes when either the confidence level changes or the sample size changes. To illustrate this, imagine a statistician takes a sample from a population with a population standard deviation of 2. The sample mean is calculated to be 10. Construct 3 different confidence intervals: 3a) Assume the sample size is 30 and the confidence level is 95% 3b) Assume the sample size is 30 and the confidence level is 90% 3c) Assume the sample...
A confidence interval can be useless if it is too wide (i.e., the margin of error...
A confidence interval can be useless if it is too wide (i.e., the margin of error is too big). Suppose that the population standard deviation is known. Which one of the following recommendations will NOT reduce the width (i.e., the margin of error) of the confidence interval? a. increase the confidence level for the interval estimation, without changing the sample size. b. lower the confidence level for the interval estimation, without changing the sample size c. lower the confidence coefficient...
Three things influence the margin of error in a confidence interval estimate of a population mean:...
Three things influence the margin of error in a confidence interval estimate of a population mean: sample size, variability in the population, and confidence level. For each of these quantities separately, explain briefly what happens to the margin of error as that quantity increases
answer true or false to the following statement concerning a confidence interval for a population mean....
answer true or false to the following statement concerning a confidence interval for a population mean. give reasons for your answer. the confidence level can be determined if you know only the margin or error, population standard deviation, and sample size.
You want to construct a confidence interval for the mean number of taste buds in top...
You want to construct a confidence interval for the mean number of taste buds in top chefs. Assume the population standard deviation is 900. (a) Calculate the minimum required sample size if you want a margin of error no greater than 300 at the 95% confidence level.   The minimum sample size is ___ chefs. (b) What will cause the minimum required sample size to increase? increasing the confidence level increasing the acceptable margin of error decreasing the acceptable margin of...
μ : Mean of variable sample size 94 99% confidence interval results: Variable Sample Mean Std....
μ : Mean of variable sample size 94 99% confidence interval results: Variable Sample Mean Std. Err. DF L. Limit U. Limit original 3.0989362 0.017739741 93 3.0522854 3.1455869 From your data, what is the point estimate, p̂ of the population proportion? Write down the confidence interval that you obtained. Interpret the result. What is the margin of error? Using the same data, construct a 98% confidence interval for the population proportion. Then, answer the following three questions: (i) What happens...
Suppose cups are for sale in a grocery store. Calculate a confidence interval for the price...
Suppose cups are for sale in a grocery store. Calculate a confidence interval for the price of the item based on the given sample. Consider Confidence level at a) 95% b) 99%. item # of items # items sold per month sigma of items sold Mean Price Stdev of Price cups 17 21 1.1 410 21 1) What is the Margin of Error? 2) What is the sampling Error? 3) What are the confidence intervals? Compare the two intervals, what...
Write the equation used for… Binomial Probability Formula: Confidence interval for a proportion: Confidence interval for...
Write the equation used for… Binomial Probability Formula: Confidence interval for a proportion: Confidence interval for a mean: Test statistic for testing proportions: Test statistic for testing means: Symbols and Equations Write the correct symbol for each term Sample mean: Sample proportion: Sample size: Sample standard deviation: Population proportion: Population mean: Population standard deviation: Confidence Intervals *Week 10 On my recent trip to space I observed the heights of 50 aliens. I found the average height to be 48 inches...
QUESTION PART A: Express the confidence interval 23.1% <p< 30.9% 23.1% <p< 30.9% in the form...
QUESTION PART A: Express the confidence interval 23.1% <p< 30.9% 23.1% <p< 30.9% in the form of ˆp±ME. _____% ±____ % QUESTION PART B: A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 10% margin of error at a 95% confidence level, what size of sample is needed? Give your answer in whole people. QUESTION PART C: A political candidate has asked you to conduct...