The Pew Research Center surveyed 1,466 U.S. adults in January, 2021 and asked about their use of socialmedia, online platforms, and messaging apps.Select the correct vocabulary word to match the description.a. 1,466 adults surveyed by Pew Research: Select an answer ✓b. All U.S. adults: Select an answer ✓c. Proportion of surveyed adults who use Snapchat: Select an answer ✓Below is a contingency table outlining the number of surveyed adults who use Snapchat.Use Snapchat Do Not Use Snapchat410Under 50 years old50 years or olderTotal246603067501160Total6568101466Determine the following probabilities. Enter your results as percents rounded to one decimal place. You donot need to include the "%" symbol. Hint: Convert to a percent before rounding!a. What is the probability that a randomly selected participant is 50 years or older and uses Snapchat?%b. What is the probability that a randomly selected participant uses Snapchat given that they are under50 years old?%c. What is the probability that a randomly selected participant uses Snapchat given that they are 50years or older?%Based on the probabilities above, what might you hypothesize about Snapchat use among U.S. adults?

Given: sample size n = 1466 a. 1466 adults surveyed by pew research is a sample. b. All US…

Answered: The Pew Research Center surveyed 1,466…

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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Determine what the key terms refer to in the following survey. To determine the average number of classes Oxnard College students were taking, a group of 26 Oxnard College students answered the following question: How many classes you are taking this semester? Link the following terms to the appropriate statement. | Sample | Population Statistic Parameter a. The average number of classes of all students in Oxnard College is 2.9 b. The 26 Oxnard College students who were surveyed c. The average number of classes of those 26 students in the sample is 2.3 d. All students in Oxnard College
In January, 2015, there were 97.89 million people in the United States who owned a smartphone that ran the Google Android operating system (OS). The Google Android OS was used on 53.2% of all smartphones. Howmany people in the United States owned a smartphone in January, 2015?
There are 64% of US adults who own a smartphone, up from 35% in 2011. Smartphones have become an important way for Americans to communicate, go online, access and share information. The Pew Research Center surveyed 1635 people in November, 2014 on smartphone ownership. Their goal was to learn how Americans use their smartphone devices. Identify the population and the sample.
Construct a frequency polygon from the following scores: 11, 7, 12, 8, 10, 9, 10, 10, 8, 9, 11, 10, 9, 7, 8, 6, 11, 9
Travel + Leisure magazine presented its annual list of the 500 best hotels in the world. The magazine provides a rating for each hotel along with a brief description that includes the size of the hotel, amenities, and the cost per night for a double room. A sample of 12 of the top-rated hotels in the United States follows. Location Rooms Cost/Night Phoenix, AZ 220 499 Orlando, FL 727 340 Los Angeles, CA 285 585 Boston, MA 273 495 Washington DC 145 495 Ashville, NC 213 279 Phoenix, AZ 398 279 Island of Hawaii 343 455 Laguna Beach, CA 250 595 Chicago, IL 414 367 Dana Point, CA 400 675 Colorado Springs, CO 700 420 What is the sample correlation coefficient? What does it tell you about the relationship between the number of rooms and the cost per night for a double room? Does this appear reasonable? Discuss. Please show steps in Excel.
Your electronic files, including both excel and word files, must be submitted. Please use a separate worksheet in excel for each question and label them respectively. Please type the section number of your class, name and ID of the team members on the file. 1. Researchers wanted to understand college students' usage of time. A formal survey of 3,000 students was taken and the results are summarized as follows: Activity Attending class Sleeping Socializing & recreation Studying Working, volunteering, student clubs Percentage (%) a) Construct a bar chart, a pie chart, and a Pareto chart. b) What conclusions can you reach concerning what college students do with their time? ii. iii. iv. 9 24 51 7 9 2. Examine the data in the file "Class survey data.xls" posted in the week 5 of course portal. a) Create a descriptive statistics summary table using Data Analysis Toolpak (Add in for Excel) for survey questions 2 through 10 inclusive. b) Identify the data types of each of the 9 variables as…
In September 2016, a Gallup poll asked the following question of 1020 adults. In general, how much trust and confidence do you have in mass media? 32% responded that they have “a great deal” or “a fair amount” of trust.A) Sample data B) Census data
There are 15 numbers on a list, and the smallest number is changed from 4 to 0.4.a) Is it possible to determine by how much the mean changes? If so, by how much does it change?b) Is it possible to determine the value of the mean after the change? If so, what is the value?c) Is it possible to determine by how much the median changes? If so, by how much does it change?d) Is it possible to determine by how much the standard deviation changes? If so, by how much does it change
A survey wants to ask students about the type of music that they want to hear at a school dance. Create 1 of each of the following survey questions appropriate for this survey: 1. Information, 2. Ranking, 3. Open Write each appropriate survey question, applicable to this situation.
Due to the popularity of instant messaging and social networking, informal elements such as emoticons (e.g., the symbol “:)” to represent a smile) and abbreviations (e.g., “LOL” for “laughing out loud”) have worked their way into teenagers’ school writing assignments. A Pew Internet and American Life Project (Apr. 2008) survey interviewed 700 randomly selected U.S. teenagers by telephone on their writing habits. Overall, 448 of the teenagers admitted using at least one informal element in school writing assignments. Recall that in a random sample of 700 teenagers, 448 admitted to using at least one informal element in school writing assignments. [Note: Emoticons, such as using the symbol “:)” to represent a smile, and abbreviations, such as writing “LOL” for “laughing out loud,” are considered informal elements.] Is there evidence to indicate that less than 65% of all U.S. teenagers have used at least one informal element in school writing assignments? Test the relevant hypotheses…
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