What is a random sample and why must samples be random?
What will be an ideal response?
Students should explain that the act of random sampling is a defining feature of a true experiment. Random sampling refers to a process that generates a mathematically random result. It leads to a way to divide a collection of cases into two or more groups in order to increase one's confidence that:
(i) The groups do not differ in a systematic way
(ii) Unknown, extraneous variables are controlled for
(iii) Statistical techniques and reasoning that relies on randomization are used.
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Which of the following was NOT a duty of the Texas Rangers?
A. To provide forensic hypnotists as an investigation tool B. To provide protection for elected officials at public functions C. To participate in educational training programs D. To provide criminal profilers for capital murder investigations
One of the characteristics of the normal distribution is that it is skewed
Indicate whether the statement is true or false.
Identify which one of the following is a government imposed limitation of privacy on the grounds of public welfare.
A. prohibiting incest B. demanding vaccinations C. making education compulsory D. requiring safety belts
Individualism refers to the ideas that Americans are expected to overcome others competing for the same rewards
a. TRUE b. FALSE