The Pew Research Center recently conducted a survey of 1007 U.S. adults and found that 85% of those surveyed know what Twitter is.

Using the survey results construct a 95% confidence interval estimate of the percentage of all adults who know what Twitter is. Round the percentages to the first decimal place.

(c) Explain why it would or would not be okay for a newspaper to make this statement: “Based on results from a recent survey, more than 3 out of 4 U.S. adults know what Twitter is.”

(d) Assuming there had never been a prior survey about U.S. adults knowing what Twitter is, what is the minimum sample size necessary to make a 95% confidence interval estimate of the percentage of adults who know about Twitter? Use the margin of error from part (a).

(e) A common criticism of surveys is that they poll only a very small percentage of the population and therefore cannot be accurate. Based upon your answer to part (d), is a sample of only 1007 adults a sample size that is too small? Write a brief explanation of why the sample size of 1007 is or is not too small.

Assignment Details:

Perform the following tasks:

• Complete the reading assignment and the interactive lesson before attempting this assignment.
• Select a recent news article about a life event of an individual. It can be health related, accident related, educational, or even achievement-oriented. It will be one "slice in the lifespan of that person." For example, you might select a story of someone who has achieved a major goal in life after experiencing a debilitating accident. An example would be Nick Vujicic. Or, you could choose the story of an individual who may be suspected of a developmental disorder, and who is involved in tragedy such as James Holmes. You are encouraged to Google these individuals and read about their stories for ideas for your own selection. Write an essay (approximately 150-175 words) in the space provided in the Assignment Worksheet section on page three addressing the following questions:

1. What is happening to this individual? Give a brief summary.
2. What stage of lifespan developmental stage/age is this person experiencing (i.e. Infant, child, adolescent, or adult and the chronological age)?
3. How might have the "twig" (person) been bent? Select at least three major developmentalist assumptions such as nature/nurture, behaviorism, genetic code, sociocultural, or any other developmental concepts from your textbook and discuss how these developmental concepts may have contributed to this person's situation before, during and after the life event featured in the news article.v

Three statistics students are having a discussion about selecting the appropriate distribution for a data set. Explain why you agree or disagree with each student and give your own suggestion for the approach the students should take.

Maya: Maya argues that since the students don’t know what the population data looks like they should simply use the sample probability mass distribution as their population mass distributions.

Greg: Greg says that the sample probability mass distribution is oddly shaped and will almost certainly not be the same as the population mass distribution function. He suggests that it’s best to find a match from the common probability mass functions that the students know about.

Jane: Jane argues that both Greg and Maya’s approach could introduce unknown error into the analysis that they are performing. She reasons that as long as there is going to be error, the students should try both approaches and choose the one that produces the results that they would most like to see.

Consider the Covid 19 virus and think about it from the perspective of the course. Would you expect decentralized private behaviour in the presence of a virus to lead to a Pareto efficient outcome? If your answer is yes, fully explain. If your answer is no, fully explain and provide one example of a corrective government policy and explain.

Consider the Covid 19 virus and think about it from the perspective of the course. Would you expect decentralized private behaviour in the presence of a virus to lead to a Pareto efficient outcome? If your answer is yes, fully explain. If your answer is no, fully explain and provide one example of a corrective government policy and explain.

The Los Angeles Galaxy soccer team is considering lowering ticket prices to increase sales. Their estimate demand curve is log(Q D) = 5.56 − 1.484 log(P).

(a) What is the estimated elasticity of demand for LA Galaxy tickets?

(b) Will the Galaxy lose revenue if they decrease ticket prices? Explain.

(c) What assumption is made about demand when we use the above equation to represent consumers’ demand for LA Galaxy tickets?

Explain (in your own words) what is Lead Poisoning Prevention and Healthy Homes Programs. Also, explain why it is important to get babies and pregnant women tested for lead poisoning. (NO PLAGIARIZING 300-500 WORDS)  

Analyze your state, county, or city health department's website (e.g., dhhs.gov). A Google search of your city’s “health profile" may also yield results. Select another state, county, or city and visit their health department's website. Compare and contrast what information you learned from your search. How does your selected health profile compare to your state, county, or city? Provide related examples based on the communities searched

Choose the data set from at least one of your classmates. Use a 0.05 significance level to test the claim that was made about the average high temperature using the data set provided by this classmate. Note that we will treat this data set as a random sample, representing all June days in the community. Show all steps, including your hypotheses, your critical values, your test statistic and your conclusion. Post a picture of your work. Was your classmate's guess correct? Explain.

Null hypothesis   85° F

90     

90     

86     

90     

91     

92     

93     

92     

92     

83     

80     

89     

92     

93     

81     

87     

88.86666667         Mean

4.344900565         Standard Deviation