Explore BrainMass

Explore BrainMass

    Hypothesis Testing & Confidence Interval

    Not what you're looking for? Search our solutions OR ask your own Custom question.

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

    Consider that 10 observations were selected from a normal population whose variance is 64. Observations are: 58, 62, 45, 50, 59, 65, 39, 40, 41 and 52. Check to 5% (.05) level of significance if there is sufficient evidence to conclude that the average population is 45.

    Calculate the sample average.
    Calculate the standard error.
    Formulate the null hypothesis and the investgacion.
    Calculate the value of the test statistic (T-Statistics).
    Calculate the confidence interval.
    Interpreting the results

    © BrainMass Inc. brainmass.com November 24, 2021, 3:27 pm ad1c9bdddf
    https://brainmass.com/statistics/confidence-interval/hypothesis-testing-confidence-interval-sample-errors-347053

    Solution Preview

    Please see the attachments.

    Null Hypothesis
    Consider that 10 observations were selected from a normal population whose variance is 64. Observations are: 58, 62, 45, 50, 59, 65, 39, 40, 41 and 52. Check to 5% (.05) level of significance if there is sufficient evidence to conclude that the average population is 45.
    Calculate the sample average.
    Sample average = = 51.1
    Calculate the standard error.
    Sample standard deviation, s =
    = 9.62000231
    Standard error = = 3.04211184
    Formulate ...

    Solution Summary

    The solution provides step by step method for the calculation of testing of hypothesis and confidence interval. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.

    $2.49

    ADVERTISEMENT