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Late payment of medical claims can add to the cost of health care. An article reported that for one insurance company,85.1% of the claims were paid in full when first submitted. Suppose that the insurance company developed a new payment system in an effort to increase this percentage. A sample of 200 claims processed under this system revealed that 180 of the claims were paid in full when first submitted.
(a) At the 0.05 level of significance, is there evidence that the population proportion of claims processed under this new system is higher than the article reported for the previous system?
(b) Compute the P-value and interpret its meaning.
Consider a hypothesis test of H0: μ = 0 against H1: μ > 0 where μ is the mean percent change in total body bone mineral content of young women. The population standard deviation is σ = 2. The level of significance for the test is α = 0.05.
probability based on binomial distribution.1 suppose that pe 0.76 pf 0.45 and pe and f 0.32. what is p e or f?2
The CEO of ABC manufacturing commissioned a study to look at the differences between the current salaries of her employees (n = 474) and their starting salaries.
Assume that the price of non-dividend paying stock is $32, its volatility is 30%, and the risk-free rate for all maturities is 5% per annum. Use derivagem to calculate the costs of setting up the following positions.
Mean and standard deviation for new sample were then computed to be M _ 6 and s _ 3. Write down the values of mean and standard deviation for original sample?
Just, a case of food poisoning was traced to a particular restaurant chain. The source was identified and corrective actions were taken to make sure that the food poisoning would not reoccur. In spite of the response from the restaurant chain, man..
question the glen valley steel company manufactures steel bars. if the production process is workingproperly it turns
The 95% confidence interval for the mean of the sampling distribution of the mean is about:
Tourism is one consideration for a company's future. A survey of 1,233 visitors to China last year revealed that 110 people visited a Starbucks during their visit.
Determine a 95% confidence interval for proportion of all voters in favour of candidate.
in a poll respondents were asked whether they had ever been in a car accident. 177 respondents indicated that they had
A group of 47 randomly selected students have a mean score of 20.2 with a standard deviation of 4.6 on a placement test. Construct a 90% confidence interval for the mean score, , of all students taking the test.
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