Question

In: Statistics and Probability

A. What happens to the confidence interval if the significance level decreases or increases? Explain. B....

A. What happens to the confidence interval if the significance level decreases or increases? Explain.

B. What happens to the margin error if the significance level increases or decreases? Explain.

c. How are margins of error related to confidence Intervals? Explain.

Solutions

Expert Solution


Related Solutions

Q1. Explain what happens to the 95 % confidence interval as the sample size increases. (2...
Q1. Explain what happens to the 95 % confidence interval as the sample size increases. Explain what happens to the width of the confidence interval for a 99% interval versus a 95%. Q2. Consider the population of adult females resident in Melbourne. Our focus is on the population mean height. Assume we do not know ? (population standard deviation) or the population mean, µ. We take a sample of adult females resident in Melbourne (n=100) and calculate the sample mean...
What does the alpha level signify? What is the critical region? What happens to the critical region if alpha increases/decreases?
    •Steps for hypothesis testing   •What does the alpha level signify? What is the critical region? What happens to the critical region if alpha increases/decreases? What effect does changing alpha have on your hypothesis test decision?   •Null and alternative hypotheses – what they are, how to construct them for all tests we’ve covered, and how they differ for one- vs two-tailed tests   •How to find the critical values for z, t (one- and two-tailed) and F....
In a short paragraph, distinguish between a Confidence Interval and the Level of Confidence. Explain what...
In a short paragraph, distinguish between a Confidence Interval and the Level of Confidence. Explain what each represents and the relationship between them. (3 points) Identify the three components of a Confidence Interval. Explain what each represents and the relationship between them. (3 points) Describe a potential issue with public opinion polls that report interval estimates, but not confidence intervals. Discuss this in a short paragraph. (3 points) TYPED ONLY PLEASE
Provide an example of What happens to the confidence interval if you (a) increase the confidence...
Provide an example of 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. .
As the sample size INCREASES for computing a confidence interval, the width of the confidence interval...
As the sample size INCREASES for computing a confidence interval, the width of the confidence interval DECREASES. 12 When the population standard deviation sigma is assumed known, a confidence interval can assume NORMALITY of the SAMPLE MEAN if the sample size is greater than 30. 12 A SYMMETRIC histogram implies the plotted variable is NORMALLY distributed. 12 The goal when using confidence intervals is to have WIDE INTERVALS to be assured that the interval contains the population parameter. 12 A...
(a) Explain what "95% confidence" means in a 95% confidence interval? (b) What type of variable...
(a) Explain what "95% confidence" means in a 95% confidence interval? (b) What type of variable is required to construct a confidence interval for a population proportion? (c) Explain why quadrupling the sample size causes the margin of error to be cut in half?
What is a rejection region? What is a confidence level? What is a confidence interval? Discuss...
What is a rejection region? What is a confidence level? What is a confidence interval? Discuss how the three concepts are related to each other. Provide original examples throughout your discussion
A confidence interval, at the 95% confidence level, will be used to answer the question, "What...
A confidence interval, at the 95% confidence level, will be used to answer the question, "What is the mean annual salary (in US dollars) of a Tesla car owner?"  Data was collected from 36 Tesla owners across the US. The mean annual salary of those 36 Tesla owners was $254000.  The standard deviation of ALL Tesla owners is known to be $1057. a)  The value at the center of the confidence interval represents what quantity?  Choose an option from the list and type its...
What is a rejection region? What is a confidence level? What is a confidence interval?Discuss how...
What is a rejection region? What is a confidence level? What is a confidence interval?Discuss how the three concepts are related to each other. Provide an example in discussion. (9pts)
What Happens to the Purchasing Value of Money during deflation? 1) Increases 2) Decreases 3) It...
What Happens to the Purchasing Value of Money during deflation? 1) Increases 2) Decreases 3) It changes but there is no way of knowing the direction or the magnitude of change. 4) No change, only the price changes. Only 1 option is correct, please explain with reason.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT