Ultrasound technology has revealed that sexual anatomy (e.g., erections in males) becomes functional before birth
a. True
b. False
Indicate whether the statement is true or false
True
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Emily has a disorder that is produced by an injury to a gene on the X chromosome, producing a mild to moderate mental impairment. What disorder does Emily have?
A. Down syndrome B. Tay-Sachs disease C. fragile X syndrome D. Klinefelter's syndrome
Lee's first history exam score is +2 standard deviations from the mean in a normal distribution. The test has a mean of 65 and a standard deviation of 5 . Lee's percentile rank would be approximately:
a. 97.5%. b. 65%. c. 75%. d. none of the above.
If we want to use the chi-square test to test the difference between two proportions, we should
a. convert the proportions to means. b. convert the proportions to frequencies. c. run a z test. d. either b or c
Children from ____ families are at significantly greater risk for both physical abuse and neglect
a. poor b. small c. two-parent d. religious