Logo
Home Study Material Contact Search
AI Chat FREE
  1. mathematics
  2. statistics
  3. an article reported the following data on oxidatio

An article reported the following data on oxidation-induction time (min) for various commercial oils: 88 104...

Free

90.2K

Verified Solution

Question

Statistics

An article reported the following data on oxidation-inductiontime (min) for various commercial oils: 88 104 130 160 180 195 132145 213 105 145 151 153 136 87 99 95 119 129 (a) Calculate thesample variance and standard deviation. (Round your answers tothree decimal places.) s2 = min2 s = min (b) If the observationswere reexpressed in hours, what would be the resulting values ofthe sample variance and sample standard deviation? Answer withoutactually performing the reexpression. (Round your answer to threedecimal places.) s2 = hr2 s = hr

Answer & Explanation Solved by verified expert
4.2 Ratings (655 Votes)

Sol:

X X - mean (X-mean)2 X2
88 -47.0526 2213.95014 7744
104 -31.0526 964.265928 10816
130 -5.05263 25.5290859 16900
160 24.94737 622.371191 25600
180 44.94737 2020.26593 32400
195 59.94737 3593.68698 38025
132 -3.05263 9.31855956 17424
145 9.947368 98.9501385 21025
213 77.94737 6075.79224 45369
105 -30.0526 903.160665 11025
145 9.947368 98.9501385 21025
151 15.94737 254.31856 22801
153 17.94737 322.108033 23409
136 0.947368 0.89750693 18496
87 -48.0526 2309.0554 7569
99 -36.0526 1299.79224 9801
95 -40.0526 1604.2133 9025
119 -16.0526 257.686981 14161
129 -6.05263 36.634349 16641
2566 -2.8E-14 22710.9474 369256

s^2=sample variance=22710.9474/19-1=1261.719 min^2

s=sample standard deviation=sqrt(1261.719)=35.521 min

Solutionb:

1 hour=60 min

1min=1/60 hr

s^2=sample variance=22710.9474/19-1=1261.719 min^2=1261.719 (1/60 )^2hr^2=0.3504775=0.350 hour^2

s=sample standard deviation=sqrt(1261.719)=35.521 min=35.521/60=0.5920167 hour=0.592 hour
Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:
  • Unlimited Question Access with detailed Answers
  • Zin AI - 3 Million Words
  • 10 Dall-E 3 Images
  • 20 Plot Generations
  • Conversation with Dialogue Memory
  • No Ads, Ever!
  • Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!
Become a Member

Other questions asked by students

Geometry
1.2K views

Q Given that AA B C is a dil the angles and side length to...

Finance
1.2K views

can we say that prices of bonds are equally sensitive to the same percentage increases or...

Biology
1.2K views

Describe Surface-Enhanced Laser Desorption Ionization - Time of Flight (SELDI-TOF) mass spectrometry as an approach for...

Geometry
1.2K views

Find angle P in the triangle below Round to a whole number a 31 8...

Geometry
1.2K views

If a vector a has a magnitude of 6 3 and b has a magnitude...

Algebra
1.2K views

1 oftwa Factoring Quadratic Factor each completely 1 m 18m 81 A m 9 B...

Accounting
1.2K views

1. Joumalize the following transactions: (Ctick on the icon to view...

Accounting
1.2K views

Rosewood Company had current assets of $562, current liabilities of $393, total assets of $772,...

Accounting
1.2K views

Kingbird Enterprises' payroll for the month ended March 31, 2024, is shown below. Record the...

Accounting
1.2K views

given information: calulate ending inventory, cost of goods sold, gross profit for LIFO,...

Accounting
1.2K views

Question 1 Using the following information for Company A. ...

Finance
1.2K views

please answer both Today is Janet's \\( 23^{\\text {rd }} \\) birthday....