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Quick Start Expectations 1.Fill in planner and HWRS HW: SP p. 22 #9-16 2.Get a signature on HWRS...
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Transcript of Quick Start Expectations 1.Fill in planner and HWRS HW: SP p. 22 #9-16 2.Get a signature on HWRS...
![Page 1: Quick Start Expectations 1.Fill in planner and HWRS HW: SP p. 22 #9-16 2.Get a signature on HWRS 3.On desk: journal, LS kit, Toolkit, calculator 4.Warm.](https://reader035.fdocuments.net/reader035/viewer/2022070404/56649f335503460f94c4ff74/html5/thumbnails/1.jpg)
Quick Start Expectations1. Fill in planner and HWRS
HW: SP p. 22 #9-162. Get a signature on HWRS3. On desk: journal, LS kit, Toolkit, calculator
4. Warm Up: Find the inter-quartile of these numbers (format it correctly):
22, 23, 44, 45, 33, 33, 8, 30
If you finish, find the range, mean, mode, and MAD
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Step 1: Write them in order from least to greatest.
8, 22, 23, 30, 33, 33, 44, 45
Step 2: Find the median of the data. • Since there are two numbers in the middle we have to find the mean of the two.
(30 + 33) / 2 = 31.5Step 3: Find the Upper Quartile: UQ: 44 + 33 = 77 /2 = 38.5Step 4: Find theLower Quartile: LQ: 23 + 22 = 55 /2 = 22.5Step 5: Identify the middle half of the data from the (UQ) to (LQ) is
the inter-quartile range: IQRUQ – LQ = IQR. 38.5 – 22.5 = 16
31.5
UQ
38.522.5
LQ
22, 23, 44, 45, 33, 33, 8, 30
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8, 22, 23, 30, 33, 33, 44, 45
Range
Mean
Mode
MAD
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p. 16
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How do you think the roller-coaster census data were collected?
Use on tonight’s HW!
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How might you decide which are faster, steel-frame roller coasters or wood-frame roller coasters?
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Range = 68 mi/h
Range = 41 mi/h
Mean = 55.03 mi/h
Mean = 52.6 mi/h
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Median = 54.5 mi/h
Median = 53 mi/h
IQR = 28 mi/h
IQR = 10 mi/h
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• IQR for steel-frame is more than twice the IQR for the wood-frame
• The median of the steel-frame is greater than the median of the wood-frame
• The middle 50% of the speeds for steel-frame are more variable than the middle 50% for wood-frame
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Box-and-Whisker Plots
At least 25% of the steel-frame coasters have speeds that are faster than those of wood-frame coasters.
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• The measures of center for steel-frame and wood-frame coasters are somewhat similar.
• Speeds of steel-frame coasters vary greatly.• Measures of spread (specifically IQR) show that at
least 25% of the steel-frame coasters have speeds that are faster than those of wood-frame coasters.
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