What are the components of a confidence interval?

  • The population mean, the margin of error, and the level of confidence
  • The population mean, the sample size, and the standard error
  • The sample mean, the margin of error, and the level of confidence
  • The sample mean, the population size, and the standard deviation
A confidence interval is composed of three parts: a point estimate (the sample mean), a margin of error (which depends on the standard error and the Z-value or T-value), and the level of confidence (which indicates the probability that the interval estimate contains the population parameter).
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