Suppose the adult unemployment rate of a city is 4.8%. If you had taken a survey of 100 adults and constructed a 95% confidence interval for the proportion of unemployed adults, which of the following would have been true?
(A)You have a 95% probability that the interval contains 4.8%
(B) Increasing the sample size would ensure capturing 4.8%
(C)The center of the interval would have been 4.8%
(D)Approximately 95% of similarly constructed intervals would
capture 4.8%
(E)The interval would have contained 4.8%
Suppose the adult unemployment rate of a city is 4.8%. If you had taken a survey...
A survey showed that 750 of the 1000 adult respondents believe in global warming. Construct a 95% confidence interval estimate of the proportion of adults believing in global warming. (Round the lower bound and upper bound of the confidence interval to three decimal places) Include description of how confidence interval was constructed. Describe the results of the survey in everyday language.
In a survey on supernatural experiences, 728 of 4009 adult Americans surveyed reported that they had seen or been with a ghost. (a) What assumption must be made in order for it to be appropriate to use the formula of this section to construct a confidence interval to estimate the proportion of all adult Americans who have seen or been with a ghost? 1. We need to assume that there are only 728 adult Americans. 2. We need to assume...
A recent study of 28 city residents showed that the mean of the time they had lived at their present address was 9.3 years and the standard deviation was 2 years. Assuming a normal population, find the 90% confidence interval of the true mean. Interpret the interval estimate. A US Travel Data Center survey conducted for Better Homes and Gardens of 1500 adults found that 39% said that they would take more vacations this year than last year. Find the...
a) Approximately 500 students take a particular college statistics course each year. As an exercise, each of the 500 students in the class is given a different random sample of the previous year's 500 final grades (in percentages) and asked to construct a 95% interval estimate of the previous year's overall average. Which of the following statements is correct? About 475 of the confidence intervals will contain the actual overall average for the previous year. It is probable that 475...
please answer #5
5. Ask Your In a survey on I experiences, 718 of 4003 adult reported that they had seen or been with a ghost (a) What assumption must be made in order for it to be appropriate to use the formula of this section to construct a confidence interval to estimate the propartion of all adult Americans who have seen or been with a ghost? We need to assume that the 718 people are the only Americans who...
In a survey of 35 adult Americans, it was found that the mean age (in years) that people would like to live to is 87.9 with a standard deviation of 15.5. a crtic of the survey company thought that the mean age would have been lower.. at 83 years. the company used the sample data to create a 95% confidence interval and found that interval to be ( 82.58, 93.22) could the crtitics age of 83 be a plausible mean...
If a hurricane was headed your way, would you evacuate? The headline of a press release states, Thirty-five Percent of People on High-Risk Coast Wil Reuse Evacuation Order, Survey of Hurricane Preparedness Finds. This headline was based on a survey of 4326 adults who live within 20 milies of the casting hurricanerisk counts of light southea st w ing the sample, care was taken to ensure that the sample would be representative of the population of co s ts in...
Take this test as you would take a test in class. 1. In a survey of 2096 U.S. adults, 1740 think football teams of all levels should require players who suffer a head injury to take a set amount of time off from playing to recover. (Adapted from The Harris Poll) (a) Find the point estimate for the population proportion. (b) Construct a 95% confidence interval for the population proportion. Interpret the results. (c) Does it seem possible that the...
American women is 139 ± 1.4 pounds. (7 points total) a. When asked to interpret this confidence interval, a student says, “95% of all adult American women would say that their ideal weight is between 137.6 and 140.4 pounds.” Is the student correct? (yes or no) (2 points) b. Another student interprets the confidence interval this way: “We can be 95% confident that future samples of adult American women will say that their mean ideal weight is between 137.6 and...
1/ In a survey of 1006 adults, a polling agency asked, "When you retire, do you think you will have enough money to live comfortably or not. Of the 1006 surveyed, 526 stated that they were worried about having enough money to live comfortably in retirement. Construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement. Select the correct choice below and fill in the answer boxes to...