Question

Irritable bowel syndrome (IBS) is a nonspecific intestinal disorder characterized by abdominal pain and irregular bowel...

  1. Irritable bowel syndrome (IBS) is a nonspecific intestinal disorder characterized by abdominal pain and irregular bowel habits. Each person in a random sample of 24 patients having periodic attacks of IBS was randomly assigned to one of three treatment groups, A, B, and C. The number of hours of relief while on therapy is recorded for each patient in the table below.

    Treatment

    A

    B

    C

    11.2

    11.6

    23.1

    8.0

    12.5

    9.9

    3.1

    10.6

    12.1

    10.9

    11.6

    13.0

    12.3

    13.9

    13.3

    9.9

    8.6

    11.0

    9.1

    18.9

    15.2

    5.0

    19.1

    15.9

    sample mean

    8.6875

    13.35

    14.1875

    sample variance

    10.1698

    14.4486

    16.9270

    QUESTion1: Give the value of the analysis of variance test statistic used to test H0: μA = μB = μC.

QUESTION 2

  1. What's the critical value if the .05 significance level is used?

QUESTION 3

  1. What's the p-value?

QUESTION 4

  1. What's the decision using the .05 significance level?

    Reject H0

    Don't Reject H0

    Reject HA

    Don't Reject HA

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