Find a video or article about confidence intervals and post a short summary and a link.
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Find a video or article about confidence intervals and post a short summary and a link.
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- What term is used to express the likelihood of an event occurring? Are there restrictions on its values? If so, what are they? If not, explain.If a 90%, a 95% and a 99% confidence interval are foung for a population mean, describe how the 3 interval estimates are related to each other. Which of the 3 intervals is most likely to contain the population mean?Explain the difference between a point estimate and confidence interval. Provide an example.
- Describe how a Confidence Interval might be a better piece of information to report from a study than a hypothesis test.8% of a sample of 400 foster children say they have suffered some type of abuse from their foster parents. Construct the confidence interval for the population of foster children who have suffered some type of abuse. Use a 99% confidence level. answer the same way as in the problem before this one.Describe when you would use a t-score instead of a z-score when finding a confidence interval.
- In statistics, what is a Confidence Interval and how confidence intervals are used in research?Katy Perry is currently the most popular account on Twitter® with about 100 million followers. Mrs. Zane wondered what proportion of Katy Perry’s Twitter followers are female, so she selected a random sample of 500 of Katy Perry’s followers. In the sample, 308 are female. Construct a 90% confidence interval for the proportion of all of Katy Perry’s Twitter followers who are female. Follow the four-step process and upload a scan/picture of your work.An e-business manager wants to estimate the mean exposure to a certain type of internet ads. Originally she constructed a 80% confidence interval and then increased the confidence level to 85%. Choose the correct statement. The confidence interval became shorter. There is no relation between the length of the confidence interval and the confidence level. The confidence interval became longer. The confidence interval didn't change. None of the above.
