Describe a normal curve, and explain the relationship of the standard deviation to this curve, including what percent of cases are found between various standard deviations on the normal curve
What will be an ideal response?
Answer will include that a normal curve is a bell-shaped distribution, with a large number of scores in the middle, tapering to a very few extremely high and low scores. The distribution of many chance events typically resembles a normal curve as do many psychological traits and events, such as memory span and intelligence, since these are determined by the action of a large number of factors. The standard deviation measures offset proportions of the curve above and below the mean. For example, roughly 68 percent of all cases (IQ scores, memory scores, heights, or whatever) fall between one standard deviation above and below the mean (±1 SD); 95 percent of all cases fall between ±2 SD; and 99 percent of the cases can be found between ±3 SD from the mean. Relationships between the standard deviation (or z-scores) and the normal curve do not change. This makes it possible to compare various tests or groups of scores if they come from distributions that are approximately normal.
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An expert in wilderness survival participates in a memory study in which she is shown a list of words. Later, she is asked to recall these words. Which words is she MOST likely to recall?
A) freshwater B) mountaintop C) songbird D) cool breeze
Both Pavlov's and Thorndike's procedures allow examination of the effects of varying the time interval between events-that is, the effects of their temporal
a. dependency.
b. compatibility.
c. reliability.
d. contiguity.
e. affinity.
A person who is blind in one eye can use each of the visual distance and depth cues EXCEPT ______
a. aerial perspective c. shadowing b. convergence d. motion parallax
Which neural systems need sensory input in the first months after birth because otherwise their neural circuits will quickly degenerate?
A) the language centers of the brain B) the eyes and visual centers of the brain C) the areas that control movement D) the auditory pathways in the brain