Access Millions of academic & study documents

Z Score Asignment

Content type
User Generated
Subject
Business
School
Cuyamaca College
Type
Homework
Showing Page:
1/2
Discussion Board 2 Median Quartile Percentile (Location) & Chebyshev’s & Z-Values
1. Using the following numbers:
15 17 22 27 29 34 37 45 49 51 53 56 59
2. The average amount of time an airplane spends in the air during the day is 8.7 hours with a
standard deviation of 2.3 hours. What is the minimum proportion(percentage) of airplanes that will
spend between 4.79 hours and 12.61 hours in the air on any given day? (round your final answer to
4 decimal places and express as a percentage ex. .6123 expressed as 61.23%)
3. The average amount of time it takes to board an airplane is 26.3 minutes with a standard
deviation of 5.2 minutes. If you have a z-score of -1.3, what time does this represent? (round your
final answer to the nearest hundredth ex. 31.05 minutes)
1A. Median: [
1
/
2
(n+1)]
= [
1
/
2
(13+1)]
= 7
th
= 37
1B. 1st Quartile: [
1
/
4
(n+1)]
= [
1
/
4
(13+1)]
= 3,5
th
=
1
/
2
(22+27)
= 24,5
1C. 65th Percentile:
Rank = percentile/100 x (n+1)
= 65/100 x (14)
= 9,1
Integer portion of R(IR) = 9
Fractional portion of R(FR) = 0,1
Rank IR and IR+1 = rank 9 and 10
= 49 and 51
65
th
percentile = (0,1)(51-49)+ 49
= 49,2
2. P(4,79 < X < 12,61)
For 4,79, Z = (4,79-8,7)/2,3 = -1,7

Sign up to view the full document!

lock_open Sign Up
Showing Page:
2/2

Sign up to view the full document!

lock_open Sign Up
Unformatted Attachment Preview
Discussion Board 2 – Median Quartile Percentile (Location) & Chebyshev’s & Z-Values 1. Using the following numbers: 15 17 22 27 29 34 37 45 49 51 53 56 59 2. The average amount of time an airplane spends in the air during the day is 8.7 hours with a standard deviation of 2.3 hours. What is the minimum proportion(percentage) of airplanes that will spend between 4.79 hours and 12.61 hours in the air on any given day? (round your final answer to 4 decimal places and express as a percentage – ex. .6123 expressed as 61.23%) 3. The average amount of time it takes to board an airplane is 26.3 m ...
Purchase document to see full attachment
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.
Studypool
4.7
Indeed
4.5
Sitejabber
4.4