Twas' Mathzizzle in the hizzle by Robyn Jones

Unit Question.

200620287 — 2017-02-27 17:33:54 UTC

How long will it take for the pendulum to swing 12 times

Pit and the Pendulum video

200620287 — 2017-02-27 17:47:54 UTC

Standard Deviation.

200620287 — 2017-03-07 17:53:52 UTC

1. find the mean
2. find the difference between each data item and the mean
3. square each difference
4. find the average (mean) of the squared differences
5. take the square root of this average

Example

200620287 — 2017-03-07 17:57:28 UTC

1,3,5,6

1+3+5+6
15/4
3.75 = the mean
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3.75-1
3.75-3
3.75-5
3.75-6
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2.75, .75, -1.25, -2.25
-----------------------------------
^^^^ square those numbers
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7.5625
.5625
1.5625
5.0625
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^^^^ add them together and then divide by the amount of data available.
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14.75
2.95 = the variance
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square root the Variance.
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standard deviation = 1.717

Mean

200620287 — 2017-03-08 18:08:31 UTC

to find the mean add up the numbers and divide by the amount of numbers present in the data.

example

200620287 — 2017-03-08 18:09:19 UTC

1 +2+3+4=10
10/4=2.5
the mean is 2.5

range

200620287 — 2017-03-08 18:10:13 UTC

to find range you take the highest number and subtract it by the lowest

example

200620287 — 2017-03-09 02:28:16 UTC

12 + 13 + 40 + 6 = 71
40-6= 34

Mode

200620287 — 2017-03-09 02:44:33 UTC

the majority number that finds the average.

example

200620287 — 2017-03-09 02:44:57 UTC

1,1,1,3,3,3,2,2,22,4,4,4

mode:2

median

200620287 — 2017-03-09 02:45:33 UTC

the middle number

example

200620287 — 2017-03-09 02:45:53 UTC

1,5,6,7,3,2,4,5,6,7
median: 3 & 2
if there are two numbers left add them and then divide by two.

Standard Deviation

200620287 — 2017-03-09 02:48:31 UTC

the distance from the average. (mean)

Normal distribution

200620287 — 2017-03-09 02:50:40 UTC

This is what we call a bell curve. within 1 standard deviation from the mean (first lines from the middle going in both directions.) is 68%. 2 standard deviations from the mean is 95%. and within 3 standard deviations is 99%

to find normal distribution.

200620287 — 2017-03-09 02:54:12 UTC

to find normal distribution. you will find the mean of the data spread first. and then find the standard deviation.

after you find them both yo will subtract and add to the mean to find your 1st standard deviation from the mean and your 2nd and your 3rd and so on.

example

200620287 — 2017-03-09 02:56:33 UTC

1,2,3,4,5
mean is 3
standard deviation =3.31
---------------------------------
1st deviation
3 - 3.31 = 0.31
( to the 1st left standard deviation)
3 + 3.31 = 6.31

( to the first standard deviation to the right)
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for the second standard deviations you will double what you did to find the first standard deviations. but double it add 3.31 twice to the mean and subtract 3.31 from the mean twice.
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for the third standard deviation do it again three times

200620287 — 2017-03-09 03:06:01 UTC

200620287 — 2017-03-09 03:07:36 UTC

200620287 — 2017-03-09 03:08:11 UTC

the standard deviation symbol is the lower case greek alphabet symbol "sigma"

Answer to the unit question

200620287 — 2017-03-24 16:32:52 UTC

This is our class data. together we were able to find out that it is 71 seconds and the prisoner is free

Reflection Piece

200620287 — 2017-03-24 16:44:02 UTC

During this unit i was confused on getting the decimals and how other people determined the standard deviation. But I eventually began to understand how they did it little by little.

Outliers

200620287 — 2017-03-27 16:35:19 UTC

Outliers are numbers that outside your (2) given standard deviations.

COmments

rminer4 — 2017-04-04 04:10:04 UTC

1.Describe how to calculate standard deviation with example 5
2. Define and describe normal distribution and Bell curve. Include image and discuss outliers 5
3. Solution to Unit Question in own words
Description of experiments and unit progression
May include image from desmos link of data 4
4. Utilized Vocab and notation 3.5
5. Reflection on learning. Strengths and struggles. Growth through unit. 5
total 23.5/25