Psyc 300 - Final Exam QUESTIONS WITH ANSWERS

Psyc 300 - Final Exam QUESTIONS |\ |\ |\ |\ |\ |\




WITH ANSWERS |\




Descriptive statistics vs inferential statistics |\ |\ |\ |\




- definition of each
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- which comes first - CORRECT ANSWERS ✔✔1. descriptive:
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summarizing/describing data |\




2. Inferential: making inferences from distributions
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Normal distribution - CORRECT ANSWERS ✔✔common probability
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distribution of values of a continuous variable around the mean
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(ie. most values of continuous variable lie around the mean)
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which is the most important distribution in statistics? - CORRECT
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ANSWERS ✔✔normal distribution |\ |\




normal distribution |\




- what goes on Vertical axis? horizontal axis - CORRECT
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ANSWERS ✔✔vertical: frequency of values |\ |\ |\ |\




horizontal: scale of continuous values |\ |\ |\ |\




examples of human characteristics that are typically normally
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distributed? (4) - CORRECT ANSWERS ✔✔height |\ |\ |\ |\ |\

,self-esteem
IQ
Shoe size |\




true or false: normal distribution is very prevalence so can
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assume a variable to be normally distributed in inferential stats -
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CORRECT ANSWERS ✔✔true |\ |\




Properties of Normal Distribution |\ |\ |\




- symmetric or assymetric?
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- mode?
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- shape of curve?
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-where is the mean, mode, and median? - CORRECT ANSWERS
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✔✔- symmetric
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- unimodal
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- bell-shaped curve
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- mean, mode, and median are equal
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Normal distribution specific shape depends on (2) (ie. if bell
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curve is v skinny, or more wide) - CORRECT ANSWERS
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✔✔population mean (most value around the mean) |\ |\ |\ |\ |\ |\




standard deviation (determines spread, extreme values less
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common)

, The Empirical Rule
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- what % of the population falls within 3SDs, 2SDs. and 1SD? -
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CORRECT ANSWERS ✔✔99.7% |\ |\




95%


68%


properties of the standard normal distribution |\ |\ |\ |\ |\ |\




- for z scores close to z= -3.49, what is the cumulative area
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- what happens to the cumulative area as Z scores increase
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(increase or decrease) |\ |\




- for z scores close to 3.49, what is area?
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- what is the cumulative area for Z=0? - CORRECT ANSWERS
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✔✔1. close to zero
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2. increases
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3. close to 1 (100%)
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4. 0.5 (50%)
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"how many hours of sleep represents the 5th percentile?"
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what is this question asking? - CORRECT ANSWERS ✔✔the
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amount of sleep (hours) where 5% of population gets less than
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that


standard normal distribution |\ |\