Statistics for Nursing Research Discussion

Statistics for Nursing Research Discussion

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Statistics for Nursing Research

Exercise 16: Understanding Independent Samples t-test

 

Questions to Be Graded

 

 

  1. What do degrees of freedom (df) mean?

 

  1. It is a mathematical concept that describes the freedom of a particular score’s value independent of the other existing scores’ values and the sum of the scores.
  2. It is a mathematical concept that describes the freedom of a particular score’s value to vary on the other existing scores’ values and the sum of the scores.

 

Answer:  Choose an item.

 

Canbulat et al. (2015) did not provide the dfs in their study. Why is it important to know the df for a t ratio?

 

  1. The df for t-tests allows us to look up t ratios on a statistical table that includes a distribution of the critical values of t to determine the significance of the t values obtained in a study.
  2. The df for t-tests allows us to look up t ratios on a statistical table that includes a distribution of the critical values of t to determine the sign (positive or negative) of the t values obtained in a study.

 

Answer:  Choose an item.

 

 

Using the df formula, calculate the df for this study.

  1. 87
  2. 88
  3. 174
  4. 176

Answer:  Choose an item.

 

 

  1. What are the means and standard deviations (SDs) for age for the Buzzy intervention and control groups?

 

Mean±SD for the Buzzy experimental group and Mean±SD for the control group were:

 

  1. 05±1.51; 8.31±1.69.
  2. 15±1.51; 8.41±1.69.
  3. 05±1.51; 8.51±1.69.
  4. 25±1.51; 8.61±1.69.

 

Answer:  Choose an item.

Statistics for Nursing Research Discussion

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What statistical analysis is conducted to determine the difference in means for age for the two groups? Was this an appropriate analysis technique? Provide a rationale for your answer.

  1. Independent sample t-test. Appropriate.
  2. Independent sample t-test. Not appropriate.
  3. Paired sample t-test. Appropriate.
  4. Paired sample t-test. Not appropriate.

Answer:  Choose an item.

 

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