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1.) A survey showed that 850 of the 1600 adult respondents who live in a household without landline phones.
(a) Construct a 95% confidence interval estimate of the proportion of adults living in a household without landline phones. Show all work. Include description of how confidence interval was constructed.
(b) Describe the confidence interval in everyday language.
2.) A random sample of 900 SAT scores has a sample mean of 1100. Assume that SAT scores have a population standard deviation of 300.
(a) Construct a 95% confidence interval estimate of the mean SAT scores. Show all work. Include description of how confidence interval was constructed.
Assume that the number of new visitors to a website in one hour is distributed as a Poisson variable. The mean number of new visitors to the website is 4.0 per hour. What is the probability that in any given hour
In the last half of the twentieth century the U.S. population grew more diverse both racially and ethnically, with persons of Hispanic origin representing.
Is it possible for a process to be in control when its control chart is based on observations from the process but to be out of control when the control chart is based on a specified standard? Explain.
Using the Activity data file, perform two single factor ANOVAs: one using SystolicBP and one using DiastolicBP as the dependent variable - perform post hoc analyses to determine which groups actually differ.
Sexual harassment at middle and high schools. A nationally representative survey of students in grades 7 to 12 asked about the experience of these students.
A patient is tested for TB at a medical clinic
Give an example of a hypothesis test you could perform at work or at home. State what the Null and the Alternative hypotheses would be in your test.
In your capacity as assistant to the administrator at Freedom Hospital, you have been asked to develop a graphical presentation that focuses on the insurance.
Find the probability mass function of this 2-tuple valued random phenomenon and show that its probability law is discrete.
If a filled container of juice is selected at random, what is the probability that it is a nonconforming container? If a filled container of juice is selected at random, what is the probability that it was filled on machine II?
Assuming that colors are chosen independently of each other for inclusion in new fashions, what is the probability that the designer will be successful?
Describe the shape of the histogram using the standard terminology of histograms. Would you describe per capita income as being fairly homogenous across the United States?
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