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For evaluation purposes, Megan needs to determine how many students she has to survey to estimate the proportion satisfied with attendance in her tennis program. There are about 1,250 students in her target population. Since no surveys have been previously done, she has no idea as to what proportion will score the program high. She is comfortable with being able to estimate the proportion within plus or minus 5% with a 95% confidence level. How many tennis club members do you recommend that she survey? Would that number change if after gathering some information she estimates that about 80% are satisfied?
Since we cannot contact the real estate agents to follow up on these errors, for the purpose of this assignment we will ignore them and work with the data set as best we can.
What happens to the confidence interval if you increase the margin of error? Explain your answer with words and by referencing the formula.
Let X1 and X2 be two independent random variables with respective binomial distributions Bin(3, 1/2) and Bin(5, 1/3). Determine
Compute F and perform the appropriate F test. Use α = .05. (to 2 decimals). Perform a t test for the significance of β1. Use α = .05. t test statistic = (to 2 decimals)
Passive exposure to environmental tobacco smoke has been associated with growth suppression and an increased frequency of respiratory tract infections in normal children. Is this association more pronounced in children with cystic fibrosis?
Does thus data support the researchers' hypothesis? Test the relevant hypothesis using a = .1 by first calculating a p-value.
Use the regression equation to determine the predicted age of a victim of a nonviolent crime when the criminal is 20 years old.
Find the critical value of t for an experiment in which there are 28 participants, using an alpha level of .01 for a one-tailed test.
What is the probability that the fifth adult selected will be the first with ADHD?- What is the probability that at least eight adults will be selected before identifying a person with ADHD?
Forecast quarterly demand where x = 0 in second quarter of last year. Quarterly seasonal factors are Q1=1.5, Q2=0.8, Q3=1.1, Q4=0.6. Determine the forecast for last quarter?
Quality Control A quality inspector checked for imperfections in rolls of fabric for one week. The random variable x represents the number of imperfections found.
A project has an initial cost of $ 42,000, expected net cash inflows of $ 9,000 per year for 7 years, and a cost of capital of 12%. What is the project's NPV?
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