Now reflect on what you just did and answer the following questions in your lab report:
(e) Did you obtain the same number of heads every time?
(f) Does your answer to (e) surprise you? Explain.
(g) For the dotplot you created using the applet, what are the observational units and variable of this graph? In other words, what does each individual dot represent?
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The previous question is pretty important; ask for help if you are not sure. |
(h) What are the most common outcomes for "number of heads" in your dotplot? Is this what you would expect? Explain why or why not.
(i) How many of these 1000 repetitions of 16 infants, assuming the null hypothesis that infants have no real preference and are equally likely to choose either toy, produced 14 or more infants choosing the helper toy? Also report the proportion of these 1000 repetitions that produced such an extreme result.
Technical note: Notice that we are actually considering the results as extreme as the result observed or more extreme (even less consistent with the null hypothesis).
(j) Fill in the blanks in the following sentence to interpret this proportion from part (i). Keep in mind you are talking about the dotplot of the simulated results, not the actual sample of the study.
Under the assumption that , if we repeated many, many times, we would get results as extreme or more extreme than , in about % of the repetitions.
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The previous question is pretty important; ask for help if you are not sure. |
