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Psyc 315 Week Two Individual

In: Philosophy and Psychology

Submitted By koolbluejay
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12) a) equal-interval (quantitative and the zero is your choice) examples: degrees in Celsius scale or Fahrenheit counting of the years (our position of zero is different from other cultures)
b) rank-order (= nominal + natural ranking is available) examples : the size of T-shirts (S, M, L, XL) or the number of stars of a movie c) nominal (everything that can be put into categories is nominal) examples of pure nominal the political party people vote for the color of hair or eyes d) ration (quantitative and the zero means that the thing is not there) example: weight of a pakage, length of a ruler, number of children in a family

e)continuous: uncountable

15) Following are the speeds of 40 cars clocked by radar on a particular road in an 35-mph zone on a particular afternoon:
30, 36, 42, 36, 30, 52, 36, 34, 36, 33, 30, 32, 35, 32, 37, 34, 36, 31, 35, 20,
24, 46, 23, 31, 32, 45, 34, 37, 28, 40, 34, 38, 40, 52, 31, 33, 15, 27, 36, 40
Make (a) a frequency table and (b) a histogram. Then (c) describe the general shape of the distribution.
(a) Frequency Table
SPEED FREQUENCY PERCENTAGE
15-19 1 2.5
20-24 3 7.5
25-29 2 5
30-34 15 37.5
35-39 11 27.5
40-44 4 10
45-49 2 5
50-54 2 5

(b) Histogram

(c) The general shape of distribution is unimodal.

19) (a) bimodal is usually a combination of two different distribution, for example heights of people, there is the distribution for men and for women, so if we do not differentiate between the two genders.

(b) approximately rectangular is the uniform distribution, all events have equal likelihood of happening. Such as tossing a die, the probability of 4 or 5, each have a 1 out of 6 chance of happening.

c) positively skewed (have long tails to the right) examples are wealth distributions (a few people have the largest amounts of money) population by country, some

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