CHYS 2P52 Lecture Notes - Lecture 7: Standard Deviation, Histogram

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More positive statements then negative (cid:862)(cid:373)ood (cid:373)a(cid:374)ipulatio(cid:374) (cid:449)as su(cid:272)(cid:272)essful(cid:863) (cid:894)go i(cid:374) dis(cid:272)ussio(cid:374)(cid:895) Variability figuring out how spread out the scores are range variance standard deviation. Range: range is based on only two data points = unreliable. **refer to back of notebook*: distance between highest score and lowest, basis for a lot of different range stats = useful. Females:2 6 1 1 1 1 2 4 3 1. Males:1 0 5 90 1 1 5 8 11 10. Boxplots mood: 2 5 3 1 4 2 3 3 4 4 1 3 1 3 1 5. Boxplots negative: 2 3 1 2 3 4 1 1 1 5. Positive: 4 4 5 3 4 4 5 5 4 3. Median line is at very bottom on first box and very top on second. Beautiful data because q75 and q25 do not cross each other. Standard deviation: symbol = s, the square-root of the calculated variance, not unbiased, more intuitive interesting characteristics.

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