State the explanatory variable being measured

Reference no: EM133192072 , Length: 4 pages

Question 1 State the research question for this study?

Question 2 Who or what are the observational units in this scenario?

Question 3 Is this an experiment or an observational study? Explain your reasoning.

Question 4 State the explanatory variable being measured on each observational unit.

Question 5 State the response variable being measured on each observational unit.

Question 6 Using the corr/regression applet and the handspan data, create a scatterplot and describe the association based on the scatterplot. Be sure to state the direction, form, strength, and state any observations that appear to be unusual (or state that there are none).

Question 7 State the value of r for this sample. Also, does the value of r match the description of the scatterplot from the previous question. Explain why or why not?

Question 8 State the null and alternative hypothesis to be tested in this study using the correlation. Use either words or symbols.

Question 9 Using the corr/regression applet to test your hypotheses from the previous question using simulation based methods. Report the p-value from your simulation and state how much evidence there is against the null hypothesis

Question 10 Using the corr/regression applet, state the equation of the linear regression line.

Question 11 Interpret the slope of the regression line in the context of the problem.

Question 12 Either interpret the y-intercept in the context of the problem or explain why it has no practical meaning.

Question 13 Based on the least-squares regression equation, predict to two decimal places the number of tootsie rolls a person with a hand span of 20 cm can grab, on average.

Question 14 State the value of r2 and interpret that value in the context of the problem

Question 15 Using the corr/regression applet, conduct a theory based hypothesis test of the slope based on your research question. Be sure to state the null and alternative hypotheses, the t-statistic, the p-value, and the strength of evidence against the null hypothesis.

Question 16 Are you able to conclude that the association between hand span and the number of tootsie rolls grabbed is causal (due to cause and effect). Why or why not?

Question 17 Are you able to generalize these results to a larger population? Why or why not?

Question 18 Summarize the results of the study. Write at least a sentence or two about what you would conclude based on the work you've done in the previous questions.

Reference no: EM133192072

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