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A random sample of size 15 is taken from a population assumed to be normal,and
= 1) 2 and s = .6.Calculate a 98 percent confidence interval for ?.
Experimental
Pertaining to or based on experiments, which are structured and controlled tests or investigations to establish or test a hypothesis.
Placebo
An inert or non-effective substance or treatment given to a participant in a study, used to contrast with an active substance to test its efficacy.
Test
An assessment or examination intended to measure a test-taker's knowledge, skill, aptitude, physical fitness, or classification in many other topics.
Independent Variable
The variable in an experiment that is manipulated to observe its effect on the dependent variable.
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