Question

The New York Times reported that the average length of stay for
42 patients in NYC hospitals was 23 hours

with a standard deviation of 2.5 hours. It reported that the
average length of stay for 36 patients in the

suburbs was 23.8 hours with a standard deviation of 3.4 hours. At
the 1% level of significance, is the length of

time a patient stays in the hospital significantly longer in the
suburbs?

(1) List all the information necessary for conducting the
hypothesis test and state which

test you are doing.

(2) State the null and alternative hypotheses and whether you would
use a right-tailed

test, a left-tailed test, or a two-tailed test.

(3) Sketch the critical reason, indicating on the sketch what the
critical value(s) are.

(4) Determine the calculated z or t.

(6) Decide if you will Reject or Fail to Reject the Null
Hypothesis.

(7) Interpret your conclusion in terms of the problem.

Answer #1

According to the Agency for Healthcare Research and Quality, the
average length of a hospital stay is 4.5 days. Hospitals can reap
many benefits by decreasing the length of patient stays in the
hospital. A random sample of 7,200 stays in an Idaho hospital had
an average stay of 4.2 days with a standard deviation of 8.3 days.
Determine whether there is evidence that the Idaho hospital has an
average stay that is lower than the national average. In the...

According to the Agency for Healthcare Research and Quality, the
average length of a hospital stay is 4.5 days. Hospitals can reap
many benefits by decreasing the length of patient stays in the
hospital. A random sample of 7,200 stays in an Idaho hospital had
an average stay of 4.2 days with a standard deviation of 8.3 days.
Determine whether there is evidence that the Idaho hospital has an
average stay that is lower than the national average. State your...

According to the Agency for Healthcare Research and Quality, the
average length of a hospital stay is 4.5 days. Hospitals can reap
many benefits by decreasing the length of patient stays in the
hospital. A random sample of 7,200 stays in an Idaho hospital had
an average stay of 4.2 days with a standard deviation of 8.3 days.
Determine whether there is evidence that the Idaho hospital has an
average stay that is lower than the national average. Determine the...

In a study of over 1000 coronavirus patients by the
National Institute of Allergy and Infectious Diseases showed a
death rate of 80 out of 500 patients receiving the new drug,
remdesivir, while the death rate for patients receiving the placebo
was 116 out of 500. Was there a significant difference between the
two groups at the 1% level of significance?
(1) List all the information necessary for conducting
the hypothesis test and state which
test you are doing.
(2)...

What is the nationwide average length of hospital stay and
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You will choose these diagnoses using ICD-9 or ICD-10 diagnosis
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Chronic Obstructive Pulmonary Disease and Bronchiectasis
Diabetes Mellitus
What are the nationwide average length of hospital stay and
average hospital costs for patients who undergo the following
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A consumer group is testing the claim that the mean
volume of Coke in cans is greater than 12 oz. A sample of 36 cans
yielded a mean of 12.019 oz and a standard deviation of 0.11 oz.
Test the claim that the mean is actually 12 oz. Use a =
0.05.
(1) List all the information necessary for conducting
the hypothesis test and state which
test you are doing.
(2) State the null and alternative hypotheses and
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The Hartford Insurance Company obtains a simple random
sample of 850 drivers and finds that 544 of them text while
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probability of texting while driving is greater than
60%.
List all the information necessary for conducting the
hypothesis test and state which
test you are doing.
(2) State the null and alternative hypotheses and
whether you would use a right-tailed
test, a left-tailed test, or a two-tailed
test....

Nationally, patients who go to the emergency room wait an
average of 7 hours to be admitted into the hospital. Do patients at
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concluded at the the αα = 0.01 level of significance level...

The average length of a maternity stay in a U.S. hospital is
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8. In words, X =
9. X ~ _____(_____,_____)
10. In words X-bar is:
11. _____ ~ _____(_________,________) (round sd
to 2 decimal places)
12. Find the probability that a randomly selected woman stays in...

The director of research and development is testing a new drug.
She wants to know if there is evidence at the 0.05 level that the
drug stays in the system for less than 314 minutes. For a sample of
7 patients, the average time the drug stayed in the system was 309
minutes with a standard deviation of 21. Assume the population
distribution is approximately normal.
Step 1 of 5:
State the null and alternative hypotheses.
Step 2 of 5:...

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