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Yvette carries out a single-factor independent groups design with four levels of the independent variable (A,...

  1. Yvette carries out a single-factor independent groups design with four levels of the independent variable (A, B, C, D). She constructs confidence intervals for the means and finds that the interval for level A does not overlap with any of the other three intervals. She may safely conclude that the population mean represented by group A

    1.

    differs from the other three means which are the same.
    2.

    differs from the three other population means.
    3.

    differs from only one of the three other means.
    4.

    is the same as the population means for B, C, and D.
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Single factor independent groups design with four levels of the independent variables means each group had different participants . The non overlapping of confidence interval for level A means population mean represented by group A is the same as other three means.

Answer. Option 4. is the same as the population means for B,C, and D.

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