Question

As a consultant, you need to use the Hospital database and construct a 90% confidence interval to estimate the average census for hospitals. Change the level of confidence to 99%. What happened to the interval? Did the point estimate change?

Determine the sample proportion of the Hospital database under the variable “service” that are “general medical” (category 1). From this statistic, construct a 95% confidence interval to estimate the population proportion of hospitals that are “general medical.” What is the point estimate? How much error is there in the interval?

Suppose you want to “prove” that the average hospital in the United States averages more than 700 births per year. Use the hospital database as your sample and test this hypothesis. Let alpha be 0.01.

On average, do hospitals in the United States employ fewer than 900 personnel? Use the hospital database as your sample and an alpha of 0.10 to test this figure as the alternative hypothesis. Assume that the number of births and number of employees in the hospitals are normally distributed in the population.

Census	Births	Personnel
144.095	874.045	861.5	Mean
102.5	480	589.5	Median
28	0	328	Mode
			Range
2	0	50	Minimum
1106	5699	4087	Maximum
149.5661598	1063.665622	821.5969925	S. Deviation
22370.03616	1131384.56	675021.6181	Variance
103.7969116	121.6946064	95.36819414	C.V.
			5 Number Summary
47.75	0	314	Quartrile 1
181.75	1309.25	1095.25	Quartrile 3

Part 3 - Inferential Statistics (2-3 paragraphs)

Use the Part 3: Inferential Statistics document.

• Create (formulate) hypotheses
• Run formal hypothesis tests
• Make decisions. Your decisions should be stated in non-technical terms.

Answer 1

Question 1 solved completely.

As a consultant, you need to use the Hospital database and construct a 90% confidence interval to estimate the average census for hospitals

Change the level of confidence to 99%. What happened to the interval? Did the point estimate change?

The confidence interval increased but the point estimate is the same.