There're several advantages of using a paired t-test. Since the same subjects are being tested in each of the varying conditions, those subjects serve as their own control. This is a major advantage as you need not consider potential differences between the subjects in the control group and the subjects who are in the experimental group. Elaborate on this concept by providing examples in which you do and do not have the same subjects serving as their own control.

There are also potential problems associated with interpreting the results of a paired t-test. Imagine you are interested in determining whether an employee of a company performs better with or without a bonus.

What are some issues that could affect the results if you have the same subjects tested in both situations?

Directional-non-directional hypotheses : When computing a t-test, it is important to distinguish between directional and nondirectional hypotheses as the direction will determine the rejection regions. Describe how the rejection regions would differ according to the type of hypothesis yo.. |

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Assessing a paired t-test : There're several advantages of using a paired t-test. Since the same subjects are being tested in each of the varying conditions, those subjects serve as their own control. |

Determining appropriate sample size : For the binomial sample information summarized below, indicate whether the sample size is large enough to use the large sample approximation to construct a confidence interval for p. |

Identifying a significant positive correlation : A researcher conducts some research in which they identify a significant positive correlation (r =0.42) between the number of children a person has and their life satisfaction. Which of the following is it inappropriate to conclude from this resea.. |

Calculate the molecular weight of a protein : The relative electrophoretic mobilities of a thirty kd protein and a 92-kd protein used as standards on an SDS polyacrylamide gel are 0.80 and 0.41, respectively. |

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