Lee, My comment to my daughter about you being a Geek is the highest complement I could give you, your one in a million and I’ve envied your abilities for years…she doesn’t know you and this was a good way to explain your talents.
John > On Jul 2, 2018, at 2:55 PM, John Robinson <profilecoven...@icloud.com> wrote: > > Is this the definition of BIG DATA? Thanks so much Lee, this is so > interesting and accurate.. > > John > > > >> On Jul 2, 2018, at 2:52 PM, Lee Larson <leelar...@me.com >> <mailto:leelar...@me.com>> wrote: >> >> On Jul 2, 2018, at 12:11 PM, Bill Rising <bris...@mac.com >> <mailto:bris...@mac.com>> wrote: >> >>> Part of the difference could come from where she wears the fitbit. After >>> some discussions in our family (back when there was a friendly competition >>> about who could rack up the most steps), experimentation showed that many >>> more steps got registered if the fitbit was on a sock/shoe than if it was >>> near the waist, and near the waist registered more than near the neck. >> >> >> I suspect this is right. I have a pretty good Omron pedometer, designed to >> be worn at waist level. It is basically an accelerometer that counts steps >> by measuring the acceleration and deceleration as I walk or run. The Apple >> Watch is on my wrist and I’m much more likely to shake my wrist around, >> adding phantom steps. >> >> I did an experiment this morning. The dog took me to Hays-Kennedy park and I >> steadily walked on the track while counting my steps. I wore the following: >> >> • Omron pedometer near my right hip clipped to the waistband of my shorts. >> • iPhone in my left pocket running the Pedometer++ app. >> • Apple Watch on my left wrist. >> • Garmin Vivofit on my right wrist. >> >> Here are the results: >> >> • 2578 = my count of the number of steps >> • 2564 = Omron (0.5% low) >> • 2607 = iPhone (1.1% high) >> • 2702 = Apple Watch (6.6% high) >> • 2637 = Garmin (4.1% high) >> >> It seems the ones near the hips are most accurate. >> >> L^2 >> >> PS/ Pedometer++ has the capability to average in the count from the Apple >> Watch. I turned that off in its preferences. >> >> PPS/ The Apple Watch may have been skewed because I was holding a very >> active leash in my left hand most of the time. >> >> --- >> Lee Larson leelar...@me.com <mailto:leelar...@me.com> >> >> Alf Todd,’ said Ukridge, soaring to an impressive burst of imagery, ‘has >> about as much chance as a one-armed blind man in a dark room trying to shove >> a pound of melted butter into a wild-cat’s ear with a red-hot needle.’ — P. >> G. Wodehouse >> Ukridge, 1924 >> >> >> >> >> >> >> >> >> _______________________________________________ >> MacGroup mailing list >> Posting address: MacGroup@erdos.math.louisville.edu >> <mailto:MacGroup@erdos.math.louisville.edu> >> Archive: >> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.mail-2Darchive.com_macgroup-40erdos.math.louisville.edu_&d=DwIFaQ&c=OAG1LQNACBDguGvBeNj18Swhr9TMTjS-x4O_KuapPgY&r=F2GFXrjLFqVo3VwvIlo_XYeEiRRjHv15rxcenz7A21woG2aFGcrzndoSsskxfmOs&m=dNUWnYbFXlWr8W04l3fW6h-Vrt2gJxwPs0zAVnmUPlQ&s=OHmCY6KEP1TdL0q0RpgDe6KAfmnCSeOUpgvmA2elkEw&e= >> >> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.mail-2Darchive.com_macgroup-40erdos.math.louisville.edu_&d=DwIFaQ&c=OAG1LQNACBDguGvBeNj18Swhr9TMTjS-x4O_KuapPgY&r=F2GFXrjLFqVo3VwvIlo_XYeEiRRjHv15rxcenz7A21woG2aFGcrzndoSsskxfmOs&m=dNUWnYbFXlWr8W04l3fW6h-Vrt2gJxwPs0zAVnmUPlQ&s=OHmCY6KEP1TdL0q0RpgDe6KAfmnCSeOUpgvmA2elkEw&e=>> >> Answers to questions: <http://erdos.math.louisville.edu/macgroup/ >> <http://erdos.math.louisville.edu/macgroup/>> >
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