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An insurance company's researcher is interested in determining whether the costs of treating patients with back pain is significantly different for managed care patients versus those with traditional insurance coverage. On average, traditional insurance pays an average of $3,455 per patient for such cases. Under managed care, a sample 25 patients yielded an average cost of $3,155 with a standard deviation of $235. 1. Write the statement for the null and alternative hypothesis that managed care costs for back pain are significantly different from the cost of treating a patient under traditional insurance. 2. Perform a hypothesis test at the .05 level of significance testing whether or not the cost for the treatment of back pain is significantly different for managed care versus traditional insurance. State your conclusion as to whether or not managed care costs for back pain are significantly different from those of traditional insurance.
Which of these best represents how much the manager will save on milk each day if she buys the milk in 1-gallon containers?
the mean on the math 165 finl exam for math 165 last year was 80 with a standard deviation of 5. What is the cutoff score for a student to be in the top 12%?
What is the decimal notation for the fraction 1/4? How can you show that 1/4 = 25/100? How can you write 5/16 as a decimal? How would you write 1/9 as a decimal?
The formula is not accurate for flightless birds, and is only a model used to estimate the wingspan of others.
Presume in community 1, 52% of individuals who will vote in election favor candidate A while while 48% favor candidate B. In community 2, 46% favor candidate A and 54% favor B.
Given the demand curve in part a above. what is equilibrium price and quantity?
An investor invested a total of $2,500 in two mutual funds. One fund earned a 4% profit while the other earned a 25 profit. If the investor's total profit was $78, how much was invested in each mutual fund?
suppose you are organizing a business meeting and are in charge of facilitating the introductions. how would you
the population of Atlanta, GA was 416.1 thousand in January of 2000. By January 2010, the population had grown to 540.9 thousand.
brooklyn corporation manufactures cds. the machine that is used to make these cds is known to produce 6 defective cds.
A simple random sample of 100 orders will be used to estimate the proportion of new or first-time customers. Find the probability that the sample proportion will be between 0.22 and 0.40.
in the august 2005 issue of consumer reports readers suffering from depression reported that alternative treatments
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