Canadian Attitudes Toward Guns: A survey asked arandom sample of 1,505 adult Canadians "Do youagree or disagree that firearms should beregistered?" Of the 1,505 in the sample, 1,288agreed.Using the formula for a confidence interval for aproportion, calculate the 95% confidence interval forthe proportion of adult Canadians who believefirearms should be registered.a) Use the formula below (and the table below) tofind the interval. Show your work and/or describethe process. Remember that you do NOT need toconsider degrees of freedom. Refer to the Module12a Slides lecture for a practice example.b) Finish the statement, "Based on the sampleresults, we can be 95% certain...p±z*P(1– p)n

Answered: Canadian Attitudes Toward Guns: A…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A confidence interval was constructed to approximate a population proportion. The interval was from 12.5% to 18.5%. The sample proportion that was used to construct this interval was 15.5%. O False O True
Data were collected on the amount spent by 64 customers for lunch at a major Houston restaurant. There data are contained in the file Houston. Based upon past studies the population standard deviation is known to be ??=$6. You are to estimate the average amount spent by a customer at the restaurant. a) Find the margin of error associated with a 95% confidence level. b) Report the 95% confidence interval for the mean. c) Find the margin of error associated with a 99% confidence level. d) Report the 99% confidence interval for the mean. e) Describe the change in the width of the confidence interval as confidence interval increases from 95% to 99%. Pleaseh help with A-C; Data: 20.50 14.63 23.77 29.96 29.49 32.70 9.20 20.89 28.87 15.78 18.16 12.16 11.22 16.43 17.66 9.59 18.89 19.88 23.11 20.11 20.34 20.08 30.36 21.79 21.18 19.22 34.13 27.49 36.55 18.37 32.27 12.63 25.53 27.71 33.81 21.79 19.16 26.35 20.01…
You're considering going to graduate school, and you would like to know how many people would recommend it. You talk to 28 people, and 6 recommend it. Construct a 96% confidence interval for p, the proportion of people that recommend you go to graduate school. What is the lower bound of this interval?
A study done by researchers at Alfred University concluded 70% of the 4380 student athletics who responded to the survey have been subjects to hazing in your answer make sure you address: What is given?What you are looking for?Write the formula:Substitute the numbers into the formula and find the margin of error.Use the margin of error to construct the 95% confidence interval. The interval must be in [from, to] form.
Subject - account Please help me. Thankyou.
In a survey of 2269 adults, 701 say they believe in UFOs. Construct a 95% confidence interval for the population proportion of adults who believe in UFOs. A 95% confidence interval for the population proportion is (nothing,nothing). (Round to three decimal places as needed.) Interpret your results. Choose the correct answer below. A. With 95% confidence, it can be said that the population proportion of adults who believe in UFOs is between the endpoints of the given confidence interval. B. The endpoints of the given confidence interval shows that 95% of adults believe in UFOs. C. With 95% confidence, it can be said that the sample proportion of adults who believe in UFOs is between the endpoints of the given confidence interval. D. With 95% probability, the population proportion of adults who do not believe in UFOs is between the endpoints of the given confidence interval.
Find the margin of error, using a 95% confidence level, for estimating the percentage of all young people who earned a high school diploma. ____?
A national survey of 2500 adult citizens of a nation found that 21% dreaded Valentine's Day. The margin of error for the survey was 4.4 percentage points with 90% confidence. Explain what this means. Which statement below is the best explanation? G O A. There is 90% confidence that 21% of the adult citizens of the nation dreaded Valentine's Day. O B. In 90% of samples of adult citizens of the nation, the proportion that dreaded Valentine's Day is between 0.166 and 0.254. O C. There is 90% confidence that the proportion of the adult citizens of the nation that dreaded Valentine's Day is between 0.166 and 0.254. O D. There is 85.6% to 94.4% confidence that 21% of the adult citizens of the nation dreaded Valentine's Day.
In a study, 110 children of a certain race in a certain city were randomly assigned to one of two groups: one group enrolled in a preschool, and the other group did not. A research question was whether attendance at preschool had an effect on high school graduation. The accompanying table shows whether the students graduated from regular high school or not and includes both boys and girls. Find a 95% confidence interval for the difference in proportions, and interpret it. Click the icon to view the data. Step 1: Calculate percentages Looking at children who went to preschool, 30 or 55.6%, graduated from high school. Looking at the children who did not go to preschool, what percent graduated from high school? 54' 30.4 % of children who did not go to preschool graduated from high school. (Round to one decimal place as needed.) Step 2: Compare In this sample, the children who attend preschool are more likely to graduate than the children who don't attend preschool. Step 3: Verify…
A survey asked, "How many tattoos do you currently have on your body?" Of the 1241 males surveyed, 182 responded that they had at least one tattoo. Of the 1047 females surveyed, 139 responded that they had at least one tattoo. Construct a 99% confidence interval to judge whether the proportion of males that have at least one tattoo differs significantly from the proportion of females that have at least one tattoo. Interpret the interval. P1 Let p, represent the proportion of males with tattoos and p, represent the proportion of females with tattoos. Find the 99% confidence interval for p, - p2. The lower bound is The upper bound is (Round to three decimal places as needed.)
In a survey of 2295 adults, 746 say they believe in UFOs. Construct a 90% confidence interval for the population proportion of adults who believe in UFOs. A 90% confidence interval for the population proportion is (nothing,nothing). (Round to three decimal places as needed.) Interpret your results. Choose the correct answer below. A. With 90% confidence, it can be said that the sample proportion of adults who believe in UFOs is between the endpoints of the given confidence interval. B. The endpoints of the given confidence interval shows that 90% of adults believe in UFOs. C. With 90% confidence, it can be said that the population proportion of adults who believe in UFOs is between the endpoints of the given confidence interval. D. With 90% probability, the population proportion of adults who do not believe in UFOs is between the endpoints of the given confidence interval.
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