Explore BrainMass

Explore BrainMass

    Statistics - Confidence Interval

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

    A random sample of 10 miniature tootsie rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were:

    3.087 3.131 3.241 3.241 3.270 3.353 3.400 3.411 3.437 3.477

    a) Construct a 90% confidence interval for the true mean weight.
    b)What sample size would be necessary to estimate the true weight with an error of + or - 0.03 grams with 90% confidence? c)Discuss the factors which might cause variation in the weight of tootsie roll during manufacture.

    © BrainMass Inc. brainmass.com June 3, 2020, 9:40 pm ad1c9bdddf
    https://brainmass.com/statistics/confidence-interval/statistics-confidence-interval-194243

    Solution Summary

    Neat, step-wise solutions are provided.

    $2.19

    ADVERTISEMENT