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Jolly Blue Giant Health Insurance (JBGHI) is concerned about rising lab test costs and would like to know what proportion of the positive lab tests for prostate cancer are actually proven correct through subsequent biopsy. JBGHI demands a sample large enough to ensure an error of ± 2% with 90% confidence. What is the necessary sample size?
A) 4,148B) 2,401C) 1,692D) 1,604
How much evidence is there that the mean composite satisfaction rating exceeds 42?
Generate three random observations from the uniform distribution between -10 and 40 by using the following random numbers:
The margin of error for polling results is typically determined as the half-width of a 95% confidence interval. With respect to a particular ballot proposition
What is an example of a directional alternate hypothesis? What is an example of a non-directional alternate hypothesis?
Determine the most economical monthly shipping schedule. Provide a table showing the routes and total costs.
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots
For certain bird species, wiith appropriate assumptions, the number of nests escaping predation has a binomial distribution. Suppose the probability of success (that is, a nest's escaping predation is .3. Find the probability that at least half of..
Find the probability that a random selection of 9 songs will have mean length of 186.30 seconds or less. Assume distribution of the lengths of the songs is normal.
Standard deviation of 1.8 years, and the distribution is approximately normal. if an employee is picked at random, what is the probability that the employee has worked at the store for over 10 years?
Indicate at which point flat-of-the-curve medicine is experienced in the following example (imagine that antibiotics have been prescribed for a given population of 1,000 elderly persons).
Calculate and interpret the appropriate statistical test to determine the relationship between the following two variables. Use the five-step model of hypothesis testing to draw conclusions at the .05 level of significance
A random sample of 200 people was taken. Sixty percent of the people favor President Obama. The 95% confidence interval for the true population of people who favor Obama is?
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