According to Inc.com, 79% of job seekers used social media in their job search in 2018. Many believe this number is inflated by the proportion of 22- to 30-year-old job seekers who use social media in their job search. Suppose a survey of 22- to 30-year-old job seekers showed that 308 of the 370 respondents use social media in their job search. In addition, 283 of the 370 respondents indicated they have electronically submitted a resume to an employer. (a) Conduct a hypothesis test to determine if the results of the survey justify concluding the proportion of 22- to 30-year-old job seekers who use social media in their job search exceeds the proportion of the population that use social media in their job search. Use α = 0.05. State the null and alternative hypothesis. (Enter != for ≠ as needed.) H0:       Ha:       Find the value of the test statistic. (Round your answer to two decimal places.)   Find the p-value. (Round your answer to four decimal places.) p-value =  State your conclusion. Do not reject H0. We cannot conclude that the proportion of 22- to 30-year-old job seekers who use social media in their job searches exceeds the proportion of the population that use social media in their job searches.Do not reject H0. We can conclude that the proportion of 22- to 30-year-old job seekers who use social media in their job searches exceeds the proportion of the population that use social media in their job searches.    Reject H0. We can conclude that the proportion of 22- to 30-year-old job seekers who use social media in their job searches exceeds the proportion of the population that use social media in their job searches.Reject H0. We cannot conclude that the proportion of 22- to 30-year-old job seekers who use social media in their job searches exceeds the proportion of the population that use social media in their job searches. (b) Conduct a hypothesis test to determine if the results of the survey justify concluding that more than 70% of 22- to 30-year-old job seekers have electronically submitted a resume to an employer. Using α = 0.05, what is your conclusion? State the null and alternative hypothesis. (Enter != for ≠ as needed.) H0:       Ha:       Find the value of the test statistic. (Round your answer to two decimal places.)   Find the p-value. (Round your answer to four decimal places.) p-value =  State your conclusion. Do not reject H0. We cannot conclude that more than 70% of 22- to 30-year-old job seekers have electronically submitted a resume to an employer.Reject H0. We can conclude that more than 70% of 22- to 30-year-old job seekers have electronically submitted a resume to an employer.    Reject H0. We cannot conclude that more than 70% of 22- to 30-year-old job seekers have electronically submitted a resume to an employer.Do not reject H0. We can conclude that more than 70% of 22- to 30-year-old job seekers have electronically submitted a resume to an employer.

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 %

Among college students, the proportion p who say they're interested in their congressional district's election results has traditionally been 75%. After a series of debates on campuses, a political scientist claims that the proportion of college students who say they're interested in their district's election results is more than 75%. A poll is commissioned, and 217 out of a random sample of 265 college students say they're interested in their district's election results. Is there enough evidence to support the political scientist's claim at the 0.05 level of significance? Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places. (If necessary, consult a list of formulas.) (a) State the null hypothesis H and the alternative hypothesis H₁. H₁ :0 H₁ :0 (b) Determine the type of test statistic to use. (Choose one) ▼ (c) Find the value of the test statistic. (Round to three or more decimal places.) (d) Find the critical…

A study was done to know if there is a relationship between obesity and atherosclerosis. A total of 775 participants was studied and there were about 312 participants with atherosclerosis. About 309 participants were not atherosclerotic and not obese, and of the 312 atherosclerotic participants about 143 were not obese. TOTAL TOTAL 10. What is the incidence among those who are obese? 11. What is the incidence among those who are not obese? 12. What is the incidence of atherosclerosis that can be attributed to obesity? Use the already rounded-off answers in the previous items when computing.

The Monterey Bay Aquarium, founded in 1984, is situated on the beautiful coast of Monterey Bay in the historic Cannery Row district. In 1985, the aquarium began a survery program that involved randomly sampling visitors as they exit for the day. The survey includes visitor demographic information, use of social media, and opinions on their aquarium visit. In 2015, the survey included 356356 visitors over age 6565 , of which 5252 used a mobile device such as an Android phone or iPad during their visit. (a) What is the margin of error ?m , of the large‑sample 95%95% confidence interval for the proportion of visitors over 6565 who used a mobile device during their visit? (Enter your answer rounded to four decimal places.)

In a survey that asked individuals about their favorite styles of music, 37 replied rock, 27 said they preferred pop music, 14 stated they like classical music the most, and 3 individuals stated they preferred opera. Based on this data, what would be the mode? Why couldn’t the mean or median be used to describe this set of values?

7. A doctor is concerned about the relationship between blood pressure and irregular heartbeats. Among her patients, she classifies blood pressures as high, normal, or low and heartbeats as regular or irregular and finds that: • 16% have high blood pressure; 19% have low blood pressure;

According to Inc.com, 71% of job seekers used social media in their job search in 2018. Many believe this number is inflated by the proportion of 22- to 30-year-old job seekers who use social media in their job search. A survey of 22- to 30 -year-old job seekers showed that 310 of the  370 respondents use social media in their job search. In addition, 275 of the 370 respondents indicated they have electronically submitted a resume to an employer.

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.

The management of Mark's Department Store estimates that approximately 2% of all shoppers enter the store with the intention of shoplifting. Of those people who engage in the act of shoplifting, 94% are apprehended by security guards using closed-circuit television (CCTV) and an electronic article surveillance system. The latter, also called a tag-and-alarm system, involves the use of a tag or label that is attached to an item. The tag is deactivated or detached at the time of purchase of the item; failure to do so will trigger an alarm when the item is carried through the gates. Of the other 98% of the shoppers, 1% are mistakenly identified as shoplifters by security guards watching them on CCTV or have triggered the alarm because the salesperson failed to deactivate or detach the tag. If a shopper is detained by security, what is the probability that the person was in fact a shoplifter? (Round your answer to two decimal places.)