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Problem 2: How will marketers change their social media use in the near future? The survey was based on 1945 B2B marketers (marketers that focus primarily on attrac...

Question

Problem 2: How will marketers change their social media use in the near future? The survey was based on 1945 B2B marketers (marketers that focus primarily on attracting businesses) and 1868 B2C marketers (marketers that primarily target consumers). The following table summarizes the results:INCREASE USE OF LINKEDIN? Yes No TotalBUSINESS FOCUSBZBBZCTotal1478 467 19451027 841 18682505 1308 3813Source: Data extracted from *2012 Social Media Marketing Industry Report; April 2012,p.27, bit ly/Ha WwDu

Problem 2: How will marketers change their social media use in the near future? The survey was based on 1945 B2B marketers (marketers that focus primarily on attracting businesses) and 1868 B2C marketers (marketers that primarily target consumers). The following table summarizes the results: INCREASE USE OF LINKEDIN? Yes No Total BUSINESS FOCUS BZB BZC Total 1478 467 1945 1027 841 1868 2505 1308 3813 Source: Data extracted from *2012 Social Media Marketing Industry Report; April 2012,p.27, bit ly/Ha WwDu: Based on the results from the crosstabs above,



Answers

Americans Using Facebook and LinkedIn. A 2018 Pew Research Center survey (Pew Research website) examined the use of social media platforms in the United States. The survey found that there is a .68 probability that a randomly selected American will use Facebook and a .25 probability that a randomly selected American will use LinkedIn. In addition, there is a .22 probability that a randomly selected American will use both Facebook and LinkedIn. a. What is the probability that a randomly selected American will use Facebook or LinkedIn? b. What is the probability that a randomly selected American will not use either social media platform?

Okay, so I know that the total number of Facebook and scram and Twitter users or 223 million So I'm just gonna write 223 and a brew V eight million at the end. I also know that the number of Instagram and Twitter followers so if I were to add those two together is 23 less than the number of Facebook users. So 23 lessons? A turnaround words. It'll be f minus 23. If I were to get all the variables on one side. I can rewrite this as negative F plus I plus t equals still negative 23. I also know that the number of Instagram users is 18 million or so. Let's follow that in order. Instagram is equals 18 more than the number of 20 Twitter users. If I got I on one side, I have my minus T equals 18. And now I have a system of three equations. Let's solve them. So I first want eliminate f so I'm gonna add one and two together. I'm gonna do that. The efs cancel. I'll get to I plus two t equals 200 and I could divide by two to each term, which will give me I plus t equals 100. And this is very similar to my third equation. So I'm gonna add this to my third equation. I minus t equals 18. When I add these two together, I'm gonna get Teoh. I tease Will cancel equals 1 18 one of I divide by two to both terms. I'll get I equals 59. So I know that the number of in scream users is 59 million. Um, defined t 59 is just 18 plus t. So I'm just going to subtract 18 from both sides and the number of Twitter Twitter users will be 41 million, right? And then, finally, to find the number of Facebook users, it's just the number of instagram plus Twitter minus 23. Um, so I'm just gonna plug the mall into here, so it's gonna be 59. Class 41 is Facebook minus 23. This will end up being, um, 100 equals Facebook minus 23. I'm gonna add 23 to both sides. So the number of Facebook users is 1 to 123 million and we could easily double check this by adding all three of these numbers together and I should get 223 million.

All right. So for number 45 we're talking about individuals between 18 to 55 up at various age levels, and then whether or not they use social media or not. And the grand total in our denominator in this problem is 5. 30. So the first question is, find the probability of them using social media news. Yeah, of them using social media. So there is a total of 338 out of the 5 30 that use social media. So when you divide that, you get approximately 300.638 for be the probability of them being 45 to 54. Uh, is going to be 100 and 2100 and 40 out of the 5 30 which is approximately 300.264 Okay, mhm for part C. The probability of them being, um, 35 to 44 year old social media users. That happens in one occurrence at 89 in the chart out of 530. So that's going to be approximately 5300.168 Our last question asks us the probability of them being a 35 to 44 year old or being a social media person. So we already know The social media person is three 38 out of the 5 30. We add that to being 35 to 44 total, which is 125 out of 5 30. But we have to subtract that overlap of them being both 35 to 44 social media users. Since we've already kind of counted that we don't want to overlap and double count. So I need to subtract 89 out of 5 30. So I add 3 38 1 25 and subtract 89 you get 3 74 divided by 5 30 that's going to be approximately 300.706

Welcome to this lesson in this lesson. You're looking for the simple size that is required to Mhm increase the usually just trita. So we have the l the margin of error that we required us five Percentage points which literally translates their mother of five within the Population proportion. We have a confidence level of 90% which makes enough for level Enough of 10%. Here we are looking for the score of Z iPhone too. So essentially that would be 95% to the left of the toro area and a day. No more cap. So 95 from here we have 95% here which is 1.6 A 0.05. So this is 1.65. Now the error margin of error actually called to mhm the Z score Experiment of the proportion 1 -2 proportion. Now we have no knowledge in the first police of the number of adults which doesn't know about treated and now there's the sample size. So if you're making the simple size of subjects we have this squad, p one minus feet all over the world squared. And now that we have all the values distance. Mhm 1.65 squad we have The open five because is either somebody uses two tower does not or somebody knows cheetah or does not Isn't the proportion because you don't know at 0.5. And now this is 0.05 quite so the end they say call to simple size so called to so that is 272. Now the second path we have a knowledge that. Mhm. Yeah. We now have an additional knowledge that That suggests that about 85% of our dogs. No. What? Three days? So with this one we now have Yeah the sample proportion Um that is 85%. Which is 0.85. So we have the cure cap as their point 15. Okay. And now we would have Yes. Yeah. Mhm. So now I would have Yeah. The Z. I found two again square mm. He's cut. We know all of them. This is one only 6 five mm. Mhm. Sport we have 0.85 times 0.15. All of us on Jail five. It's quiet yes. And this gives us 13, 969. Okay. So now that we know the proportion there Known what tree types as 85 of adults. We now have the sample size that will need another to estimate this proportion as 169. Okay. The last but we were going to know the question demands us to If the now we know that 169 I needed for this survey, will it be plausible? Will it be a good idea to serve a college? And just now this would be a good idea because if there's a college, most of them already know how to use twitter. So The target group should merely be to the 15%. Who doesn't really knows. So they should go into a random place and probably have a more random dicta, which may include a large up proportion of those who do not know how two U. Street that or work with this. So there's just no stands for the time. This is the end of the lesson. Yeah. Mhm.


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