A manager for Shopee wants to determine the current percentage of Filipino adults who now use the Internet. How many adults must be surveyed in order to be 95% confident that the sample percentage is in error by no more than three percentage points when: * A. In 2020 , 73% of adults used the internet B. No know possible value of the proportion

A manager for Shopee wants to determine the current percentage of Filipino adults who now use the Internet. How many adults must be surveyed in order to be 95% confident that the sample percentage is in error by no more than three percentage points when: * A. In 2020 , 73% of adults used the internet B. No know possible value of the proportion

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

An automotive manufacturer wants to know the proportion of new car buyers who prefer foreign cars over domestic. Step 1 of 2 : Suppose a sample of 1453 new car buyers is drawn. Of those sampled, 363 preferred foreign over domestic cars. Using the data, estimate the proportion of new car buyers who prefer foreign cars. Enter your answer as a fraction or a decimal number rounded to three decimal places.
The table below shows the result of a polygraph test conducted on 2000 college students. Students were asked whether they had ever cheated on a test. All of them denied having cheated. What percentage of those that were telling the truth were found to be lying? Round to the nearest tenth of a percent. Test finds student lying Test finds student truthful Total Has cheated 80 14 94 Has not cheated 203 1703 1906 Total 283 1717 2000
among the 1018 respondents, 428 said that pesticides are "not at all harmful." What percentage of respondents said that pesticides are "not at all harmful"?
The question is as follows: If 23 more HRDs responded to the survey, which of the following is the best estimate of the number of people employed by the 23 organisations these HRD represent? A. 95,907 B. 117, 965 C. 2,206,000 D. 3,308,780 E. 15,379,628 Please see attachments. Thanks
A report shows that 32% of citizens want to move out of theirneighborhood. An alderman wants to test if the proportion in his district is lower.Which of the following best describes the test to be used?
Consider any survey. If you want to be specific, think about polling people if they prefer Coke or Pepsi. However, the content of the survey is not relevant to this question. You do want some accuracy and so you decide to be 95% confident that the error is at most 3% in measuring the proportion (of people who prefer Coke over Pepsi or some other proportion). This is the most common error estimate reported on tv. So how many people do you need to survey to be this accurate? The formula in the book for no preliminary estimate spits out the number 1068 (after rounding up). This is also the number of times you should toss your coin to be 95% sure that your error is at most 3% (in the last discussion). If you want to restrict your survey to only residents of Charleston, a population of 20,000, you only need to poll 1068 residents of Charleston. Sounds reasonable. If you only want to conduct your survey in Illinois, 13 million residents, you still only need to survey 1068…
Find an article of your choice which uses proportions, and copy and paste the address of that article in this step. Identify at least one sample proportion within the article (you can list more than one if you like), and state what that sample proportion measures. For example, if you're told that the sample proportion of people in Renton who are taller than 5'11" is 80.7%, and you're also told that the sample size is 57, then you would state the proportion as 46/57 in your response for this part of the assignment. You will probably have to interpret what is being said in the article in order to be able to state specifically what the sample proportion represents. Also, you might not have � or �, you might only have the percentage or a decimal equivalent. Often, the size of the sample is stated somewhere in the article, and it's important to find that value. So, if � is given, please include it in this part of the assignment. If stated in the article, identify whether the sample is a…
Suppose an internet marketing company wants to determine the percentage of customers who click on ads on their smartphones. How many customers should the company survey in order to be 94% confident that the estimated proportion is within 5% of the population proportion of customers who click on ads on their smartphones?
In a city with three high schools, all the ninth graders took a Standardized Test, with these results: Highschool Mean score of test number of 9th grades Glenwood 81 275 Central City 95 338 Lincoln High 66 172 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was 83 . Of course, that is incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place. mean of all ninth grader's scores =
Use the results from a survey of a simple random sample of 1155 adults. Among the 1155 respondents, 85% rated themselves as above average drivers. We want to test the claim that of adults rate themselves as above average drivers. Complete parts (a) through (c). a. Identify the actual number of respondents who rated themselves as above average drivers. (Round to the nearest whole number as needed.) b. Identify the sample proportion and use the symbol that represents it. (Type an integer or a decimal rounded to two decimal places as needed.) c. For the hypothesis test, identify the value used for the population proportion and use the symbol that represents it. = (Type an integer or a decimal rounded to two decimal places as needed.) G
To the nearest whole number, what percent of respondents did not choose Dominos or Marcos as their favorite pizza place?
A programmer plans to develop a new software system. In planning for the operating system that he will use, he needs to estimate the percentage of computers that use a new operating system. How many computers must be surveyed in order to be 99% confident that his estimate is in error by no more than five percentage points? Complete parts (a) through (c) below.