Explore BrainMass

Explore BrainMass

    Population Means

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    Infants weighing more that 1700 grams who require respiratory assistance within the first 24 hours of birth and met other clinical criteria. The following table is a result of measurements of plasma volume (ml) made during mechanical ventilation.
    subject / sample sz/ sample mean/ sample st. dev.
    paralyzed/ 5 48.0 8.1
    nonparalyzed/ 7 56.7 8.1

    You may assume equal standard deviations. Construct a 98% confidence interval for the difference of the two population means.
    Do you think there is a difference between the two population means?

    © BrainMass Inc. brainmass.com March 4, 2021, 6:00 pm ad1c9bdddf
    https://brainmass.com/statistics/confidence-interval/population-means-22974

    Solution Preview

    Construct the 98% confidence interval for the difference of the two population means
    <br>Let Md=µ1- µ2= 56.7 - 48.0 = 8.7
    <br>The estimated standard error, SMd, is computed assuming that the variances in the two populations are equal. when n1 &#8800; n2. The formula for MSE is:
    <br>MSE = SSE/df
    <br>where df is the ...

    Solution Summary

    Infants weighing more that 1700 grams who require respiratory assistance within the first 24 hours of birth and met other clinical criteria. The following table is a result of measurements of plasma volume (ml) made during mechanical ventilation.
    subject / sample sz/ sample mean/ sample st. dev.
    paralyzed/ 5 48.0 8.1
    nonparalyzed/ 7 56.7 8.1

    You may assume equal standard deviations. Construct a 98% confidence interval for the difference of the two population means.
    Do you think there is a difference between the two population means?

    $2.49

    ADVERTISEMENT