When you follow up a hypothesis test with a confidence interval, sometimes you must change the significance level so the results match.  When can you leave the level the significance level from the hypothesis test the same as for the confidence interval, and when must you change the significance level from the hypothesis test?  Explain using examples.

Q: You're considering going to graduate school, and you would like to know how many people would…

A:

Q: Explain what the test statistic is used for constructing confidence interval on a proportion. And…

A: The z proportion test is used for constructing confidence interval on a proportion.

Q: Translate the statement into a confidence interval. Approximate the level of confidence. In a survey…

A:

Q: Eric is studying people's typing habits. He surveyed 525 people and asked whether they leave one…

A:

Q: You hear a lot of talk about increasing global temperature, so you decide to see for yourself if…

A: From the given information, Sample data as given below: 9.301 8.788 9.173 8.824 8.799…

Q: |Suppose that you wanted to know if children's attention spans have decreased. You collect a sample…

A:

Q: When we construct a 90% confidence interval, we say that "we are 90% confident that the true…

A:

Q: You and a friend are interested in knowing if two groups have the same proportion of smokers. The…

A: 1. In the given situation, the proportions of two groups are comparing. The suitable test for…

Q: If a student provided 90% confidence intervals in all ten questions, how many points would we expect…

A: Note: As per the guidelines, in case of multiple subparts, answer to first three subparts will be…

Q: Identify the test statistics, pvalue, confidence interval

A: Given: The data is, Male Female 16040 23985 25711 13703 1365 17966 7482 17570 18223…

Q: Using inferential statistics, it is commonly possible to say that you have 100% confidence in a…

A: It is an important part of statistics. It is widely used.

Q: The relationship between confidence interval and hypothesis testing is very close. Do you agree?…

A: Yes, the relationship between confidence interval and hypothesis testing is very close. Generally,…

Q: ) Let's examine the relationship between CI's and hypothesis tests: Hint: you need to think about…

A:

Q: In each of Exercises, answer true or false to each statement concerning a confidence interval for a…

A: Confidence interval:In general, it can be defined as an interval estimate of the population…

Q: It is known as the confidence coefficient

A: Here, 1- α represent the confidence level. The probability that the confidence interval it contains…

Q: Many high school students take the AP tests in different subject areas. In 2007, of the 211,693…

A:

Q: Explain how the confidence interval of the mean is affected by (all other factors constant). a)…

A: The confidence interval is the interval in which the population parameter is likely to fall. Let xi;…

Q: “I had a pretty normal day,” “I have little confidence in our ability to win today,” and “That’s so…

A: Statistical concepts can be used in day-to-day lives also.

Q: Critical Thinking. In Exercises 17–28, use the data and confidence level to construct a confidence…

A: Critical value:For 95% confidence level,

Q: Which interval is wider: (a) the 95% confidence interval for the conditional mean of the response…

A:

Q: Which statement is NOT true? Select one: a. The greater the level of confidence, the wider the…

A: The type I error occurs when rejecting the null hypothesis if it is true. The type II error occurs…

Q: You and a friend are interested in knowing if two groups have the same proportion of smokers. The…

A: Solution : Given : n1 = nn2 =500             x1 = 490             x2 = 400              α = 0.05…

Q: How do you find the z value for a confidence level? If n=330 and (p-hat)=0.62, I'm looking to find…

A: Obtain the margin of error at the 95% confidence level. Margin of Error: The margin of error is…

Q: The mileage a car got on 5 trips from Greenwood to Greenville was used to create a 90% confidence…

A: Solution-: Given: The 90% C.I. for the true mean mileage of such trips is (32.32,38.32) The…

Q: Let the paired difference be the score before minus the score after attending the counseling…

A: Introduction: Denote μd is the true mean difference in depression scores before and after counseling…

Q: d. Explain what "90% confidence" means. e. Would a 95% confidence interval be wider or narrower?…

A: As per our guidelines, we are allowed to answer first question parts only. Thanks   3) Number of…

Q: A histological test for cancer has sensitivity, specificity, positive predictivity, and negative…

A: To find, Which of the four indicators would you use to reassure a patient that the positive result…

Q: A 95% confidence interval for the difference in mean fat content for meat vs, all-beef hot dogs is…

A: It is provided that the 95% confidence interval for the difference in the mean fat content for meat…

Q: You're considering going to graduate school, and you would like to know how many people would…

A: Given: X= 6, N=28. Therefore, P=XN=628=0.214

Q: We calculate a confidence interval. Then we gather additional data and find a new confidence…

A: The margin of error can be calculated as: E=z×σn  Here,  z= confidence level n = Sample size σ =…

Q: You wonder what percentage of students care about the language of instruction in choosing among…

A: We have to find sample size required.

Q: any fans of ‘80’s music believe that the song “Open Arms” by the band Journey is an iconic song in…

A: Solution: Given information: Margin of error = E = 0.05 Confidence level = 0.90= 0.90 Assumed…

Q: A school psychologist wants to determine whether children who live with both parents perform better…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: a) explain the type of data you have here and the hypothesis test you would use to determine the…

A: We can easily find Mean and Standard deviation for face to face and Virtual learning by using…

Q: It is known that the mean cholesterol level for all Americans is 190 construct the relevant…

A: We have given that  Sample size n = 100 Sample mean = 198 Standard deviation = 15

Q: Suppose that a friend of yours says that they were reading about confidence intervals and ask you…

A: We have to answer questions base on confidence interval.

Q: A recent survey found that 35 people out of a sample of 410 South Africans suffer from diabetes.…

A:

Q: The interval is a enter your response here​% confidence interval. ​(Round to one decimal place as​…

A: Given that  Sample size n =1100 Sample proportion p^=68%=0.68 Margin of error =E = ±4%=±0.04

Q: What would happen (other things being equal) to a confidence interval if you calculated a 95%…

A: Confidence interval is an interval estimate which is computed from statistics of observed data, that…

Q: Define what is a Confidence Interval in Statistics and how we can apply it to a real life situation

A: Given that  Confidence interval in Statistics and how to apply in real life situation....

Q: How do I find confidence levels

A: The confidence level helps in deciding the size of the confidence interval . Also, it helps in…

Q: What happens to our range when we increase the confidence level?

A:

Q: People love living in California for many reasons, but traffic isn’t one of them. Based on a random…

A: Given People love living in California for many reasons, but traffic isn’t one of them. The random…

Q: find an explain a study that uses confidence intervals. Share and explain what the study was about…

A: Given example  - find an explain a study that uses confidence intervals. Share and explain what the…

Q: Debbie and Ethan are going to construct confidence intervals from the same simple random sample.…

A: Given information Two confidence interval 98% and 95% Debbie’s confidence interval 98% Ethan’s…

Q: View both photos attached and answer the question below.   Estimate the net sale in future…

A: Given :

Q: How does increasing the number of replicate measurements affect the reliability of measurements?…

A: The confidence interval is given as  C.I.=x+zsn where n, is the number of sample from the…

Q: If you increase the confidence level, the confidence interval ________________. A.stays the same…

A:

Q: When conduct your survey, you also ask whether wedding. Seven out of the 40 couples reported having…

A: It is given that sample size (n) is 40 and x is 7.