If a researcher wishes to predict with 97.5 accuracy, the level ...

[APUS57]

If a researcher wishes to predict with 97.5 accuracy, the level of significance would be
 
  a. .05
  b. .01
  c. .25
  d. .025

Question 2

A researcher states in an article that a new experimental treatment, trialed in the outpatient setting in a tri-physician practice in northern Oregon, produces better outcomes than the control treatment for patients with COPD.
 
  The p-value given is p <.05. What does this mean? (Select all that apply.)
  a. There is better than a 95 chance that at the research site mentioned in the article the experimental treatment really DOES produce better outcomes for patients with COPD.
  b. The probability of error is 95.
  c. There is very little chance that the intervention is effectiveless than a 5 chance, in fact.
  d. There is better than a 95 chance that the experimental treatment will produce better outcomes for all COPD patients.
  e. There is less than a 5 chance that the researcher has reached this conclusion in error.

[ghepp]

Answer to Question 1

ANS: D
If one wishes to predict with 95 accuracy, the level of significance (p) is 1 minus 95 = .05. In nursing research, alpha is usually set at 0.05, meaning that the researcher will allow a 5 or lower chance of making a type I error.

Answer to Question 2

ANS: A, D, E
Probability theory addresses statistical analysis as the likelihood of accurately predicting an event or the extent of an effect. In probability theory, the meaning of statistical results is interpreted by the researcher in light of his or her knowledge of the field of study. Probability is expressed as a lowercase p, with values expressed as percentages or as a decimal value ranging from 0 to 1.

[APUS57]

Excellent

[jackie]

Gracias!