Question

question 8 suppose a classroom teacher wants to measure whether offering candy as a reward will increase the number of times that a student raises his/her hand to answer a question in class. a study yields the following data. if column 1 is the number of times that a student raised their hand to answer a question before the candy reward was implemented, and column 2 is the number of times that the same students raised their hands to answer questions after the candy reward was implemented, which of the following is the appropriate inference method to analyze these data? a. two independent samples b. matched pairs c. inference for regression

Explanation:

The data consists of pairs of observations (number of times raising hand before and after candy - reward) for the same set of students. Matched - pairs analysis is used when we have dependent samples, such as before - and - after measurements on the same subjects. In this case, the two columns of data are related because they pertain to the same students. Two independent samples would be used if we had two separate groups of students. Inference for regression is used to predict a response variable based on an explanatory variable, which is not the case here.

Answer:

B. Matched pairs