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Chapter 15: Q7 (page 681)

One article on the topic of statistical errors in medical research listed 47 potential sources of error. Try to identify 5 potential sources of error.

Short Answer

Expert verified

The five potential sources of errors are listed below:

  • Incorrect sample size
  • Unclear base assumptions
  • Failure to verify the underlying assumptions of the test
  • Changes in the type of the data
  • Incorrect reporting of insignificant results

Step by step solution

01

Given information

Evaluate statistical errors in medical research.

02

Step 2:Broadly classify the sources of error

Medical researchers broadly evaluate the following types of errors in the statistical study:

  • Data collection error
  • Analysis error
  • Error related to conclusions from the results
03

State the five specific sources of errors

Evaluate each type one by one.

Data collection:

  • The sample size is inappropriate, which may increase the chances of type II error and affect the power of the test.
  • The design of the experiment is not appropriate; hypothesis error or unclear.

Data analysis:

  • Failure to verify the assumptions required for the test leads to usingthe incorrect test.
  • The type of data is changed for convenience without a clear explanation.

Interpretation:

  • Expressing the results insignificant results incorrectly as equals. Here, the true interpretation of the insignificance means that the evidence was not enough to support the result statistically.

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