25 blood samples were selected by taking every 7th blood sample from a rack holding 187 blood samples. The mean white blood count was 8.636 with a standard deviation of 3.9265. Construct a 90% confidence interval for the true mean using the FPCF. What sample size would be needed for an error of +/-1.5 with 90% confidence.? Use a z value taken to 3 decimal places in your calculations.

MATLAB: An Introduction with Applications
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25 blood samples were selected by taking every 7th blood sample from a rack holding 187 blood samples. The mean white blood count was 8.636 with a standard deviation of 3.9265.

  • Construct a 90% confidence interval for the true mean using the FPCF.
  • What sample size would be needed for an error of +/-1.5 with 90% confidence.? Use a z value taken to 3 decimal places in your calculations.
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