Explore BrainMass

Explore BrainMass

    Confidence Intervals and Significance Levels

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

    68. In a study, Germination and Emergence of Broccoli, conducted by the Department of Horticulture at Virginia Polytechnic Institute and State University, a researcher found that at 5°C, 10 seeds out of 20 germinated, while at 15°C, 15 out of 20 seeds germinated. Compute a 95% confidence interval for the difference between the proportion of germination at the two different temperatures and decide if there is a significant difference.

    70. According to USA Today (March 17, 1997), women made up 33.7 of the editorial staff at local TV stations in 1990 and 36.2% in 1994. Assume 20 new employees were hired as editorial staff.

    a) Estimate the number that would have been women in each year, respectively.
    b) Compute a 95% confidence interval to see if these is evidence that the proportion of women hired as editorial staff in 1994 was higher than the proportion hired in 1990.

    © BrainMass Inc. brainmass.com June 3, 2020, 7:56 pm ad1c9bdddf
    https://brainmass.com/statistics/confidence-interval/confidence-intervals-and-significance-levels-117316

    Attachments

    Solution Summary

    Confidence Intervals and Significance Levels are investigated. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.

    $2.19

    ADVERTISEMENT