Recall from Activities 16-1 and 16-3 that the Kaiser Family Foundation commissioned an extensive survey in 2004 that investigated the degree to which American youths aged 8–18 have access to various forms of media. Of the 1036 girls in the sample, 64% had a television in their bedrooms, compared to 72% of the 996 boys in the sample.
a. Suppose you want to use these sample results to produce a 95% confidence interval for πg - πb. Describe in words what πg - πb represents.
b. Calculate this interval, and interpret what it reveals. Be sure to mention whether the interval contains all negative values, all positive values, or some of each.
c. Calculate a 99% confidence interval for πg - πb. Comment on how its midpoint and width compare to the 95% interval
note: TT= pi
In: Statistics and Probability
|
Year |
Pi(cm) |
Year |
Pi(cm) |
|
1999 |
44.2 |
2010 |
39.2 |
|
2000 |
47.6 |
2011 |
38.3 |
|
2001 |
38.5 |
2012 |
46.1 |
|
2003 |
35.8 |
2013 |
33.1 |
|
2004 |
40.2 |
2014 |
35.0 |
|
2005 |
41.2 |
2015 |
39.3 |
|
2006 |
39.8 |
2016 |
42.0 |
|
2007 |
39.7 |
2017 |
41.7 |
|
2008 |
40.5 |
2018 |
37.7 |
|
2009 |
42.5 |
2019 |
36.6 |
Please clarify each step of the solution.
In: Civil Engineering
|
Year |
Pi(cm) |
Year |
Pi(cm) |
|
1999 |
44.2 |
2010 |
39.2 |
|
2000 |
47.6 |
2011 |
38.3 |
|
2001 |
38.5 |
2012 |
46.1 |
|
2003 |
35.8 |
2013 |
33.1 |
|
2004 |
40.2 |
2014 |
35.0 |
|
2005 |
41.2 |
2015 |
39.3 |
|
2006 |
39.8 |
2016 |
42.0 |
|
2007 |
39.7 |
2017 |
41.7 |
|
2008 |
40.5 |
2018 |
37.7 |
|
2009 |
42.5 |
2019 |
36.6 |
Please clarify each step of the solution.
In: Civil Engineering
For the past 104 years, a certain state suffered 27 direct hits from major (category 3 to 5) hurricanes. Assume that this was typical and the number of hits per year follows a Poisson distribution. Complete parts (a) through (d). a) What is the probability that the state will not be hit by any major hurricanes in a single year? The probability is nothing. (Round to four decimal places as needed.) (b) What is the probability that the state will be hit by at least one major hurricane in a single year? The probability is nothing. (Round to four decimal places as needed.) Is this unusual? Yes No (c) What is the probability that the state will be hit by at least three major hurricanes in a single year, as happened last year? The probability is nothing. (Round to four decimal places as needed.) Does this indicate that the 2004 hurricane season in this state was unusual?
In: Math
What are the two primary theories from international finance that try to predict FX rate changes from CHANGES in interest rates? How are they different?
In: Finance
What types of changes have financial markets experienced during
the last two decades? Have they been perceived as positive or
negative changes? Explain.
In: Finance
2.) How do changes in supply/demand impact prices and the quantities of good produced/consumed? How do these changes impact economic efficiency?
In: Economics
The coefficient of expansion for liquids is:
a) greater than that for solids
b) different for different temperatures
c) smaller as the volume changes
d) greater as the volume changes
In: Physics
One feature that unites Kingdom Animalia is embryonic development, which is not found elsewhere in the Unikonta. The history of the Animalia is a story about changes in this embryonic development, resulting in changes in the physical appearance of animals with different body plans. Explain how specific changes in embryogenesis resulted in the diversity in adult animal body plans across the major clades of Animals. Make sure to discuss how the stages of embryogenesis have evolved across the Animal phylogeny and how these changes have allowed for new adaptations to arise. Spend one paragraph (and no more) discussing the role of homeotic genes in embryonic development.
In: Biology
In spring 2014, then-President Obama sent a memo to the US Department of Labor (DOL) Secretary directing reform of FLSA to address white-collar exemptions and, effectively, increase the number of employees entitled to overtime pay. Some changes have been approved and became effective as of December 2016. Research some of the revisions the DOL adopted such as an increase in minimum salary requirements and changes to the current “primary duty” test.
-Analyze some of the controversies and objections associated with these modifications.
-Explain and justify your view--do these changes benefit employees or the employer?
-Do you prefer the previous FLSA law or the changes?
In: Economics