University:
Yeshiva University
Course:
1412 | Calculus I
Academic year:

2020
Views:

134

Pages:

7
Author:

Tatum B

Chi-Square Key How do you know if your dats is the result of random chance or environmental factors? Biologists and other scientists use relationships they have discovered in the lab to predict events tisat might happen under more real-life circumstances. At some point those predictiom am either supported or not by real data. It would be nice if the two sets of data matched exacily, but more often than not they don't. This could be attributed to random Buctuations in the variables, or it could be due to a factor that the scientists overlooked. How does the scientist know! There are many statistical calculatiom that help answer this question. One that is commonly used by biologists is Chi-Square Model 1- Calculating Chi-Square (x²) Hypothesia There is an equal chance of flipping heads or taike on a coin. Coin A Observed data (0) Expected (c) (alpha - epsilon) Heads 108 100 8 Tails 92 100 -8 64.64 64.64 x ^ 2 = 1.28 Total 200 200 Coin B Observed data (0) Expected (e) (o - c) 4 Heads 12.0 100 20 400 80 100 -20 400 4 Taals Total 200 200 1. What is the hypothesis that has been tested in Model 17 There is an equal charce of flipping heads or tails 2. Describe in one or two complete sentences the experunat being performed in Model 1. A coin is being flipped & heads or tails is being recorded 3. How many flips of the cain will be conducted in each trial for the experiment in Model 1 200

Chi Square - Key

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