Question

Late payment of medical claims can add to the cost of health care. An article (M. Freudenheim, “The Check Is Not in the Mail,” The New York Times, May, 2018) reported that for one insurance company, 85% of the claims were paid in full when first submitted. Suppose that the insurance company developed a new payment system in an effort to improve this payment rate. A sample of 200 claims processed under this system revealed that 180 of the claims were paid in full when first submitted.

1. What is the unit of observation?

2. What measurement was recorded for each observation? Specify the data type.

3. What is the population parameter of interest? Give a specific definition of the population parameter of interest.

4. Specify the research question.

5. State the null and research hypotheses.

6. Draw the conclusion of the test.

Give a specific interpretation of the p-value.

Z-Test

One-Sample Statistics
	n	p
Paid?	200	.90

One-Sample Test
	Test Value = .85
	z	Sig. (2-tailed)	Difference
Purchased?	2.35	.020	.05

Answer 1