Business statistics assignment | Business & Finance homework help

  

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*** Do not copy or paste from a previous assignment you may have done for someone else or from the internet. Plagiarism will be checked. All references and citations must be in and below the appropriate work on a reference page if applicable. All work must be done with substance, no rambling. ***

  

*** To help with the problem, I have included two worksheet attachments. One is a worksheet on doing a hypothesis test for a proportion. There is a section on the worksheet that will allow you to put in your numbers and the hypothesis test values will automatically be calculated for you. The second worksheet gives simple formulas for the calculation of the desired sample size in the homework problem as well. ***

  

 Suppose that there are two (2) candidates (i.e., Jones and Johns) in the upcoming presidential election.  Sara notes that she has discussed the presidential election candidates with 15 friends, and 10 said that they are voting for candidate Jones. Sara is therefore convinced that candidate Jones will win the election because Jones gets more than 50% of votes.
 

Answer the following questions:

  

1. Based on what you now know about statistical inference, is Sara’s conclusion a logical conclusion? Why or why not?

2. How many friend samples Sara should have in order to draw the conclusion with 95% confidence interval? Why?

3. How would you explain your conclusion to Sara without using any statistical jargon? Why?