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Lecture for Lisa3

Lecture for Lisa3 - Science is is not IS A test of a...

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11 Science is & is not… IS: A test of a hypothesis NOT: “Let’s do this and see what happens…”

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22 Science & Ethics Scientists must weigh risks versus benefits Informed Consent
33 Science & Ethics HYPOTHETICAL: What if the elephant experiment study could have led to a cure for cancer?

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44 Time for some Statistics May be a bit confusing May take some time to understand
55 Correlation Measures the extent to which two things are associated Symbol: r 3 kinds: positive, negative and zero

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66 Positive correlation As one variable goes up, the other one goes up Note: r is positive
77 Negative correlation As one variable goes up, the other one goes down Note: r is negative

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88 Zero correlation No relationship between variables Note: r is zero
2/28/11 99 Correlation The number tells the STRENGTH of relationship Bigger = stronger Closer to zero = weaker The sign (+/-) tells the direction of the relationship

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1010 What Kind of Correlation?
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Lecture for Lisa3 - Science is is not IS A test of a...

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