When n is small (less than 30), how does the shape of the t distribution compare to the normal distribution?

A) ?It is almost perfectly normal.
B) ?It is flatter and more spread out than the normal distribution.
C) ?It is taller and narrower than the normal distribution.
D) ?There is no consistent relationship between the t distribution and the normal distribution.


B

Psychology

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Suppose researchers find that greater alcohol consumption is associated with poorer performance on a skills test. Which of the following fictitious correlation coefficients could possibly represent that correlation?

a. -4.57 b. -0.87 c. +0.91 d. +0.00

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Individual differences between subjects are less problematic in related samples designs than in independent samples designs

Indicate whether the statement is true or false

Psychology

When items are correctly ____________________ in long-term memory, children are more likely to recall accurate information about them

Fill in the blank(s) with correct word

Psychology

Olga is shorter than average. She has mild intellectual developmental disorder with her greatest difficulties in math and science. Although her external genital development is normal, her ovaries are poorly developed and she is infertile. She is suffering from ______.

a. Klinefelter's syndrome
b. Turner's syndrome
c. Fragile X syndrome
d. Tay-Sachs disease

Psychology