Sample information: 24 out of 1000 people who were surveyed had type 2 diabetes. Use the above sample information and construct two confidence intervals (one with confidence level of 90% and the other one with confidence level of 99%) to estimate the proportion of people who have type 2 diabetes. What is the relationship between the confidence level and the size of the confidence interval? Is this significant? Why is it important to understand this concept?

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: (b) Estimate the sample size needed if no estimate of p is available. A sample of elementary school…

A: From the provided information, Confidence level = 95% Margin of error = 0.06

Q: Several years ago, 36% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: What is the purpose of finding a confidence interval for a proportion?

A: A true (or population) proportion (denoted as p), by definition, is essentially determined as the…

Q: Suppose the data in the table below was found from a case-control study.  What measure of…

A: Provided data in the table was found from a case-control study. We need to construct the 95%…

Q: Let's say you survey a random sample of people. You find that 53% prefer apples over oranges. You…

A: given data  p^ = 0.5390% ci for p is : (0.448,0.612)based on this ci we have to find the given…

Q: A learn-to-type software program claims that it can improve your typing skills. To test the claim…

A: We make the following table for the difference from the given information  Typing Speeds (in Words…

Q: We wish to estimate what percent of adult residents in Ventura County like chocolate. Out of 400…

A: Given  X=349, n=400  Level of significance ɑ=0.05

Q: What is the confidence interval estimate of the population mean µ? million <u < $ million (Round to…

A: Given : x = 245, 214, 197, 169, 164, 151, 146, 146, 146, 146 n = 10 Confidence level : CL = 90%…

Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: Illustrate the formula for the confidence interval?

A: confidence interval is defined as a range of values so defined that there is a specified probability…

Q: Exercise 2 Problem 12 12 Information. You are given the data in the table on the right 21 19…

A: Solution Here is two different questions I am solving exercise 2

Q: How does the sample size and percentage of confidence influence the width of a confidence interval?

A: We have to define effect on width of C.I.

Q: Now look at the variable DIFFERENCE in the data file “Fuel Efficiency.” If there is no difference…

A: Fill-Up No. Computer Driver Difference   1 41.5 36.5 5   2 50.7 44.2 6.5   3 36.6 37.2 -0.6…

Q: The figure to the right shows the results of a survey in which 2500 college graduates from the year…

A:

Q: What is the impact of changing from the 95% confidence interval to the 90% confidence interval? The…

A: Confidence Interval Confidence Interval refers to the range of the value that we expect our estimate…

Q: 90% confidence interval is narrower than a 95% confidence interval using the exact same data.…

A: Conditions on confidence interval:   As the confidence level increases, width of the confidence…

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: Sales of trumpets in a day is modeled as Normal. A random sample of 36 days is looked at. The sample…

A:

Q: If α = 0.05, then what is the confidence level?

A: Given: α = 0.05   we know that, Confidence level+ α = 1

Q: The effectiveness of a diet designed to lower serum cholesterol is to be evaluated by measuring the…

A: Solution:From the given information, the pair of observations are 10, confidence level is 95%,Paired…

Q: 20. OxyContin The drug OxyContin (oxycodone) is used to treat pain, but it is dangerou because it is…

A:

Q: A sample of 700 from population A has a proportion of interest of 0.24 while a sample of 600 from…

A: Confidence Interval: The form of the confidence interval is, CI = Point estimate ± Margin of error…

Q: What formulas are used to find the confidence interval? Researchers comparing the effectiveness of…

A: According to the given information in this questionWe need to construct 95% confidence interval

Q: Several years ago, 44% of parents who had children in grades K-12 were satisfied with the quality of…

A: The null and alternative hypotheses are:   H0:p=0.44.   H­1:p≠0.44.

Q: A hospital administrator hoping to improve wait times decides to estimate the average emergency room…

A: Solution: Given information: n= 64 Sample size of patients  The 95% confidence interval based on…

Q: Estimate 95% confidence interval for the proportion of household experiencing burglary in 2010."

A: 25.8 households per 1,000 were the victims of home burglary. These data are obtained from a survey…

Q: The bar graph below displays students' responses to the uestion "What caffeinated drinks do you…

A: From the bar chart, it is clear that the highest percentage of students drink coffee because its…

Q: The figure to the right shows the results of a survey in which 1500 college graduates from the year…

A: For proportion of college students that expect to stay at their first employer for 3 or more years…