A researcher claims that exactly 40% of all adults in the U.S. use their cell phone for most of their onlinebrowsing. You believe that the true proportion is different. To test this, you take a simple random sampleof 200 adults in the U.S and find that 40% of them use their phone for most of their online browsing. Test at5% significance.Round to the fourth as neededWhat's the minimum population size required?How many successes were there?Ho: Select an answerSelect an answer vHA: Select an answer v Select an answerTest Statistic:P-value:Did something significant happen? Select an answerSelect the Decision Rule: Select an answerThere Select an answer v enough evidence to concludeSelect an answerBuild a 95% confidence interval and decide if you can conclude the same. Use your calculator to do this andround to the fourth decimal place.Can we conclude the same as our Hypothesis Test?? v because the true proportion of U.S. adults that use their cell phones for most of their onlinebrowsingSelect an answer>>

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Answered: A researcher claims that exactly 40% of…

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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ample is QUESTION 2 Researchers conducted two surveys about teens are their use of social media. The first survey asked a random sample of 800 U.S. teens about their use of Instagram. A second survey asked the same questions to a random sample of 2253 Canadian teens. In these two studies, 73% of U.S. teens and 88% of Canadian teens said that they use Instagram. Use these results to answer the following questions about the proportion of U.S. and Canadian teens that use Instagram. (Round to the nearest whole hundredth as needed). What is the difference between the proportion of U.S. teens and the proportion of Canadian teens? The standard error for these two samples is Using a 99% confidence level, the lower limit is and the upper limit is QUESTION 3 Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answ Relative Me Worksheet - Py...docx Reading - Mapp.pdf W ALK Letter -2.pdf Worksheet - W....docx W DIC. étv 12 目

Researchers conducted two surveys about teens are their use of social media. The first survey asked a random sample of 800 U.S. teens about their use of Instagram. A second survey asked the same questions to a random sample of 2253 Canadian teens. In these two studies, 73% of U.S. teens and 88% of Canadian teens said that they use Instagram. Use these results to answer the following questions about the proportion of U.S. and Canadian teens that use Instagram. Is there a statistically significant difference between the use of social media by U.S. teens and Canadian teens? No, there is no difference between the proportion of U.S. teens that use Instagram and the proportion of Canadian teens that use Instagram because both the lower limit and the upper limit of the confidence interval are negative values. Yes, the proportion of U.S. teens that use Instagram is significantly less than the proportion of Canadian teens that use Instagram difference because both…
An ecology class used binoculars to watch 23 turtles at Walden Pond. It was found that 18 were box turtles and 5 were snapping turtles. What kind of study is this? -observational -census -simulation -experimental
By a small margin, Facebook remains the top choice of social media over all ages, with 29% using Facebook most often among those using social media sites. However, more visually oriented social networks such as Snapchat and Instagram continue to draw in younger audiences. When asked "Which one social networking brand do you use most often?" the results in the table show the top brands chosen by Americans aged 12-34 who currently use any social networking site or service. Social M edia Site Faceboo k Snapchat Instagra m Twitter Percentage That Use Most Often 29 28 26 6 20 (a) What is the sum of the percentages for these top social media sites? Give your answer as an exact number. Macmillan Learning top social media sites: What percent of Americans aged 12-34 use other social media sites most often? Give your answer as an exact number. other social media sites: do %
A car wash is assessing the average wait time for its customers. The median wait time is 4 minutes. Does a customer who waits for 5 minutes represent an abnormal wait time? The customer who waits 5 minutes an abnormal case, because 50% of customers wait more than minutes.
A polisher wishes to estimate the proportion of United States voters who favor capital punishment. How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 3%
Should an observational study or an experiment be performed to answer the research question below? Explain your choice. Do students who miss their classes frequently earn lower grades than those who attend a high percentage of their classes?
Suppose we conducted an experiment to examining differences in watermelon weight (kg) between two types of watermelon plant (hybrid and non-hybrid) exposed to two different sunlight exposure (30%, 50%). Table below shows the recorded data. 30% 50% Hybrid Non-hybrid 1.6, 1.8, 1.5 2.9, 3.1, 2.8 1.4, 1.7, 1.2 2.2, 2.4, 2.2 1. What is the number of replications? 2. What is the experimental unit? 3. What is the response variable?
-One Sample Dichotomous Outcome- Suppose a similar study was conducted two years ago and found that the prevalence of smoking was 27% among freshman. Problem: If the investigator believed that this is a reasonable estimate of prevalence today, how many subjects would be needed?

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