State the probability sampling method described in each example. a. To determine why many residents at a local nursing home are not eating their full meals, a researcher obtains a list of all residents at the nursing home and separates the list into two subgroups: residents who eat their full meals and residents who do not. The researcher randomly selects 12 residents from each subgroup to be in her sample.b. A professor obtains a list of all registered students in his class and randomly selects 40 students from the list to participate in a course evaluation.c. An administrator at a local elementary school identifies that 24 classes are taught throughout the day at her school. From this list, she selects 12 classes and measures preparedness among all students in those 12 classrooms.d. A
psychologist randomly selects one athlete to participate in a study from a list of all athletes on campus. Then, beginning with the randomly selected athlete, he selects every fourth athlete on the list to also participate in the study.
What will be an ideal response?
(a) simple stratified sampling, (b) simple random sampling, (c) cluster sampling, (d) systematic sampling
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Which statement supports the proposition that the presence of an X chromosome appears to be necessary for life?
a. X-chromosomal genotypes are expressed as consistent phenotypes at a rate of around 85%, while Y-chromosomal genotypes are expressed as consistent phenotypes at a rate of only about 15%. b. The X chromosomes are expressed far earlier in the prenatal period than the Y chromosomes c. There are no chromosomal disorders wherein a person has only Y chromosomes. d. Most of the lethal chromosomal disorders, including Tay-Sachs disease and cystic fibrosis, are located on the Y chromosome.
African Americans score, on average, _____ points lower on standardized intelligence tests than do European Americans.
A) 5 B) 10 C) 15 D) 20
Charles Darwin developed the universality hypothesis, which suggests that:
A) all individuals process emotions in the same way. B) appraisal of stimuli causes a universal reaction. C) all animals exhibit emotions. D) emotional expressions have the same meaning for everyone.
MStotal = MSrows + MScolumns + MSinteraction + MSwithin-cells
Indicate whether the statement is true or false