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CONFIDENCE

The CONFIDENCE function in Google Sheets is a statistical tool used to calculate the confidence interval for a population mean. It is typically used in hypothesis testing or determining sample sizes. Learn how to utilize this function effectively with our comprehensive guide.

Function Syntax and Parameters

Syntax: CONFIDENCE(alpha, standard_deviation, pop_size)

Parameters:

  • alpha: The significance level used to calculate the confidence level. It represents the probability of a Type I error.
  • standard_deviation: The standard deviation of the population.
  • pop_size: [Optional] The size of the population. If omitted, it assumes an infinite population by using a correction factor.

Step-by-Step Tutorial

  1. Calculating the confidence interval for a population mean:
    • Example: =CONFIDENCE(0.05, 10, 100)
    • Result: The confidence interval for a population mean at a 95% confidence level with a standard deviation of 10 and a population size of 100.

Use Cases and Scenarios

  1. Market Research: Determine the required sample size for conducting a survey to estimate population parameters.
  2. Quality Control: Ensure the accuracy of a production process by establishing confidence intervals for mean measurements.
  3. Medical Studies: Estimate confidence intervals for population means in clinical trials to assess treatment effects.

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