Round your answer for the test statistic to two decimal places and your answer for the p-value to three decimal places.test statistic = ip-value = iConclusion: RejecteTextbook and MediaYesO No✓ Ho-Does the sample provide evidence that the average number of social ties for a cell phone user is significantly different from 634,the hypothesized number for all US adults?e Textbook and MediaO E7Pthe test8C(9F10 How Many Social Ties Do You Have?Most US adults have social ties with a large number of people, including friends, family, co-workers, and other acquaintances. It isnearly impossible for most people to reliably list all the people they know, but using a mathematical model, social analysts estimatethat, on average, a US adult has social ties with 634 people.¹ A survey of 1700 randomly selected US adults who are cell phone usersfinds that the average number of social ties for the cell phone users in the sample was 664 with a standard deviation of 778. Does thesample provide evidence that the average number of social ties for a cell phone user is significantly different from 634, thehypothesized number for all US adults?¹Hampton, K., Goulet, L., Rainie, L., and Purcell, K., "Social Networking Sites and Our Lives," Pew Research Center, pewresearch.org.June 16, 2011.State the null and alternative hypotheses.Ho: H 664 vs HA: H = 664Ho: H=634 vs HA: > 634O Ho: H= 664 vs H₁: μ # 664O Ho: H=634 vs HA: H<634O Ho: H=634 vs HA: #634e Textbook and Media5:88

The hypothesized average number of social ties, μ0=634.The sample size, i.e., the sampled number of…

Answered: How Many Social Ties Do You Have? Most…

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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3 28 4 1 pts Question 3 In the 2010 U.S. Census, one of the questions asked was "How many people live in your household?" The table below shows the probability distribution of this variable, X. X (Number of People) 3 4 5 6 7 1 0.267 0.336 0.158 0.137 0.063 0.024 0.015 P(X = x) What is the probability that a randomly chosen household has more than 4 people living in it? 0.898 0.102 0.761 1.961 0.239 Question 4 1 pts In the 2010 U.S. Census, one of the questions asked was "How many people live in your household?" The table below shows the probability distribution of this variable, X. X (Number of People) 1 2 3 4 15 6 7 P(X = x) 0.267 0.336 0.158 0.137 0.063 0.024 0.015 Which of the following mathematical notations means "the probability that a randomly chosen household has no more than 4 people living in it?" P(X = 4) P(X 4) P(X 2 4) P(X < 4) Question 5 1 pts
Ancestry and Region. The U.S. Census Bureau collects information on the U.S. population by ancestry and region of residence and publishes the results in American Community Survey. According to that document, 18% of the population resides in the Northeast. a. If ancestry and region of residence are not associated, what percentage of Americans of Irish ancestry would reside in the Northeast? b. There are roughly 37 million Americans of Irish ancestry. If ancestry and region of residence are not associated, how many Americans of Irish ancestry would reside in the Northeast? c. There are, in fact, 9.25 million Americans of Irish ancestry who reside in the Northeast. Given this information and your answer to part (b), what can you conclude?
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A recent study examined the drinking behaviors of undergraduate college students (male and female freshmen). Each participant was asked how many alcoholic beverages they consumed during the past 7 days. The researchers wish to determine if there is a difference in the drinking habits of males and females in this age group. A recent study examined the drinking behaviors of undergraduate college students (male and female freshmen). Each participant was asked how many alcoholic beverages they consumed during the past 7 days. The researchers wish to determine if there is a difference in the drinking habits of male and females in this age group. Female Male 9 13 5 9 5 7 9 11 8 10 3 5 5 6 2 10 1 16 7 12 Which type of test will you run? What is the independent variable? What is the dependent variable?
A business magazine mailed a questionnaire to the treasurers of all of the Top 400 most profitable companies, and received responses from 22% of them. Those responding reported that they did not find that such surveys intruded significantly on their workday. What is the population and sample? The sample is The population is 1. the 22% (88) of the treasurers who responded 2. the 78% (412) of the treasurers who did not respond 3. all treasurers of all companies 4. treasurers of the Top 400 most profitable companies 5. all profitable companies 6. The business magazine 7. all people 8. the proportion of those responding that said they did not find that such surveys intruded significantly on their workday.
Can you answer #1 and #2 please
You are an education researcher interested in studying if race or ethnicity affects the severity of punishment children receive. Through open records, you are able to collect from several high schools the length of suspensions given to kids for fighting along with the race/ethnicity of the child. The state of Texas divides school children into one of 7 race/ethnicity groups: African American, American Indian, Asian, Hispanic, Pacific Islander, White, or Multiracial. You want to compare the average length of suspension among these 7 groups. Which statistical test would be best to determine if there is a significant difference in the severity of punishment among the different groups? one-sample t-test related samples t-test independent samples t-test ANOVA
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Healthy Sleep Duration. The Centers for Disease Control and Prevention (CDC) define a healthy sleep duration to be at least seven hours per day. The CDC reports that the percentage of people who report a healthy sleep duration varies by marital status. The CDC also reports that in 2018, 67% of those who are married report a healthy sleep duration; 62% of those who have never been married report a healthy sleep duration; and 56% of those who are divorced, widowed, or separated report a healthy sleep duration. The file SleepHabits contains sample data on the sleeping habits of people who have never been married that are consistent with the CDC’s findings. Use these data to answer the following questions. Develop a point estimate and a 95% confidence interval for the proportion of those who have never been married who report a healthy sleep duration. Develop a point estimate and a 95% confidence interval for the mean number of hours of sleep for those who have never been married. For…
The owners of an amusement park count the number of adults and children who attend the park on a Friday and Saturday. The completed table is shown below. Friday Saturday Total Adults 245 371 616 Children 154 277 431 Total 399 648 1,047 How does the joint frequency for the number of adults who attended the amusement park on Friday compare to the joint frequency for the number of children who attended the amusement park on Saturday? The joint frequency for the number of adults who attended the amusement park on Friday is 399, which is less than the joint frequency for the number of children who attended the amusement park on Saturday, 431. The joint frequency for the number of adults who attended the amusement park on Friday is 154, which is less than the joint frequency for the number of children who attended the amusement park on Saturday, 277. The joint frequency for the number of adults who attended the amusement park on Friday is 371, which is…
A city official would like to know if there is public support for increasing funding for arts programs. To collect data, the city official stands outside a concert hall after a show and surveys every 25th person to exit and asks their opinion about raising funds for the arts. Which of the following describes the population in this scenario? all residents of the city the members of the city council all city residents who support the arts the people surveyed by the city official
Organizations such as J.D. Power and Associates use the proportion of owners likely to repurchase a particular automobile as an indication of customer loyalty for the automobile. An automobile with a greater proportion of owners likely to repurchase is concluded to have greater customer loyalty. A study was conducted to compare the customer loyalty for three automobiles: Chevrolet Impala, Ford Fusion, and Honda Accord. The study contained 500 respondents and the data is summarized in the Microsoft Excel Online file below. Use the spreadsheet to perform the required calculations and hypothesis test.

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