When n is greater than 30, the shape of this is almost exactly normal.
A. distribution of population means
B. distribution of sample means
C. distribution of population samples
D. standard deviation of sample means
Answer: B
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Which of the following is an accurate finding of the Head Start program?
A. Children in Head Start did not show any gains in intellectual skills. B. Children in Head Start did not show any gains in socio-emotional development. C. Adolescents who had been in Head Start were more likely to hold jobs. D. Adolescents who had been in Head Start were more likely to repeat a grade later in schooling.
What is the source of all color?
a. light c. hues b. shadows d. pigment
Animal research shows that a variety of environmental influences prompt monozygotic twinning, including __________
A) early fertilization of the ovum B) young maternal age C) variation in oxygen levels D) poor diet
Dr. Hyper treated 20 patients using a new therapeutic procedure
An outside observer rated the children's activity level on a laboratory task before and after the treatment; 80% of the children decreased their activity level following treatment, and Dr. Hyper concluded that the procedure was highly effective. In Dr. Hyper's experiment, what is the independent variable? a) The children's diagnosis as hyperactive or not b) The presence of the observer c) The new therapeutic procedure d) The children's activity level