Archive for the ‘Emily’ Category.
Emily turned eleven on Tuesday December 12th. We celebrated by going to Leatherby’s for dinner and ice cream. The kids had lots of fun and made a big mess of themselves. Afterwards we went home and Emily opened her presents. She was happy to finally get a tomagachi like her sister Anne. Now they both can play with those little electronic pets to their hearts content. Emily also got the game of LIFE and a couple of barbie dolls.
Emily had trouble answering one of her homework questions for math class: “What is more accurate: a measurement given in centimeters or a measurement given in millimeters?”
The author of this question made the classic mistake of confusing precision and accuracy. Precision is about being well defined while accuracy is about correctness. The unit in which a measurement is given has nothing to do with its accuracy (unless the unit is incorrect of course).
Take, for example, the question “What is the value of pi?” An answer of “2.78495718397583711985″ would be very precise but not accurate. An answer of “3.14″ would be accurate but not necessarily precise. The amount of precision needed depends upon who’s asking the question. If your math teacher asks you “What is the value of pi?” then the answer “3.14″ would be accurate and precise enough for the situation. However, if a NASA engineer is calculating orbits for the space shuttle and asks you for the value of pi, “3.14″ is probably not going to cut it. Space shuttle orbits require significantly more precision, say, 3.14159265358979323846264338327950288419716939937510
What? NASA engineers aren’t regularly asking you for the value of pi? Well, it must just be you, buddy, because I’ve got NASA engineers calling me night and day wanting to know the value of pi. It’s a good thing I know all about precision and accuracy.
So, in answer to the question “What is more accurate: a measurement given in centimeters or a measurement given in millimeters?”, I had Emily write the following:
“Neither. A measurement given in millimeters may be more precise but not necessarily more accurate.”
I then wrote a little explanatory paragraph below her answer:
“Emily’s Dad thinks this is a poor question because it confuses the concepts of precision and accuracy”.
Who knows, maybe Emily’s teacher is a former NASA engineer and will appreciate an answer like that? Now, if we can just get Emily through fractions we’ll be making good progress…
This is the second year in a row that we went to our Ward Christmas Party. I’m generally not the sociable type so I pretty much avoid ward activities when I can but Emily’s primary group was putting on a little play so I didn’t mind going.
The play was short on dialog and long on lots of little girls fluttering around like angels. They also showed a couple of scenes from a movie about Jesus’ life. I wasn’t really focusing that much on the script because I was trying to keep the camera trained on Emily. She is sixth from the right in the picture above.
After the play I snuck back to the dressing room and got Emily to pose for a picture in her little angel costume. I think she had fun participating and, heck, it’s the least I can do to go see Emily at the Ward Christmas Party.
I’ll probably be attending more ward activities in the future because I lost my dream calling (playing the piano in Primary) and am now the Elder’s Quorum secretary. Thus, I’ll feel more of an obligation to go and socialize than I would if I was still the primary pianist. Oh well, it’s better than being the Sunday School President – I hated that calling.