1- the number of days a patient was hospitalized with a diagnosis of traumatic i

Question

1- the number of days a patient was hospitalized with a diagnosis of traumatic injury were recorded as follows:

20 19 18 18 17 17 17 15 15 14 14 14 13 13 12 11 11 10 10 10
10 9 9 8 8 8 8 8 7 7 7 6 6 6 6 6 6 6 5 5 5 5 5 5 5 5 4
4 4 4 4 4 4 3 3 3 3 3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1

a. What is the value of n?...........

b. Calculate the percentage of scores with stays greater than one week. (compute to the second decimal).................. %

c. Calculate the percentage of scores with stays greater than two weeks.............. %

d. Determine the percentile rank for a stay of nine days............... th

e. Determine the percentile rank for a stay of three days............. st

2- Determine the percentile rank for a stay of nine days........... st.

3-Determine the percentile rank for a stay of three days.......  th

Explanation / Answer

a) Value of n = 75 (total number of observations)

b)
The percentage of scores with stays greater than one week = 1 - 0.0800 = 0.92 = 92%

c.
The percentage of scores with stays greater than two weeks = 1 - 0.2133 = 0.7867 = 78.67%

d.
The percentile rank for a stay of nine days is 72 th

e.
The percentile rank for a stay of three days is 29 th

No. of Days Frequency Relative Frequency Cumulative Relative Freq 1 6 0.0800 0.0800 2 10 0.1333 0.2133 3 6 0.0800 0.2933 4 7 0.0933 0.3867 5 8 0.1067 0.4933 6 7 0.0933 0.5867 7 3 0.0400 0.6267 8 5 0.0667 0.6933 9 2 0.0267 0.7200 10 4 0.0533 0.7733 11 2 0.0267 0.8000 12 1 0.0133 0.8133 13 2 0.0267 0.8400 14 3 0.0400 0.8800 15 2 0.0267 0.9067 17 3 0.0400 0.9467 18 2 0.0267 0.9733 19 1 0.0133 0.9867 20 1 0.0133 1.0000

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