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Get Full Access to Contemporary Mathematics - 6 Edition - Chapter 5 - Problem 23
Get Full Access to Contemporary Mathematics - 6 Edition - Chapter 5 - Problem 23

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Set up and solve equations for each of the following business situations. A regular

ISBN: 9780538481267 378

Solution for problem 23 Chapter 5

Contemporary Mathematics | 6th Edition

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Problem 23

Set up and solve equations for each of the following business situations. A regular lightbulb uses 20 watts less than twice the power of an energy-saver lightbulb. Ifthe regular bulb uses 170 watts, how much does the energy-saver bulb use?

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STAT 2004 Week 2 Lecture 4 Wed. 01/25/17 Causation: one variable causes or creates the change in another variable Simple random sample: all observations in the sample have equal chance of being selected Survey question: what is your weight (asking football team)  Create a sample frame: list of all potential respondents (list of all 116 players) ID Weight -randomly select 5 values (n=5) 1 118 76,114,90,91,108 2 230 -obtain data from those 5 values 3 211 116 200 X76283 X 114284 X =290 X =30891 108283 Population Parameter of interest: mean weight ( weight) Estimate: sample statistic 283+284+308+293+283 ^= = 290.2 lbs 5 Parameter of interest: class= ^=mode=sophomore mode=most frequent occurring value or another way to estimate class: Fr=1 So=2 Jr=3 Sr=4 ^ class= median (center number) C76So C 114 So C91F C 90Jr C 108 Sr 2 2 1 3 4 put them in order 1, 2, 2 ,3, 4 ^ class= 2 (sophomore) Logical questions: what’s the average weight  how much do the weights vary Variance “ ” 2 Standard deviation “” = √❑ = √variance - how do we calculate this measurement of variation

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