Evidence-Based Practice for Nurses

0.15% 0.15% 2.35% 13.5% 34% 34% 13.5% 2.35% –3 SD <1 –2 SD <25th –1 SD 16 th +1 SD 84 th +2 SD 95 th +3 SD 50 th 97 th FIG ...

Half of the people would be 23 years or older, while half would be younger than 23 years. Correlation Coefficients Bivariate ana ...

Match the following terms: Range a. Rank Semiquartile range b. Difference between maximum and minimum values Percentile c. Meas ...

correct (American College of Physicians—American Society of Internal Medi- cine, 2001; Hoekstra, Johnson, & Kiers, 2012). In ...

Researchers ask the same types of questions when they analyze data using inferential statistics. They ask, “What is the probabil ...

Researchers determine whether the results were obtained by chance us- ing inferential statistical tests, sometimes known as test ...

reducing threats to internal and external validity. They also take steps to reduce error when deciding whether a research hypoth ...

error because there is no temperature change in the real world. The goal of hypothesis testing is to accept true claims and reje ...

Individuals make decisions every day. They make decisions based on their assumptions about the world, only to find out later tha ...

when in reality it does not. Patients begin using the device, which inaccurately measures blood sugar. Because nurses evaluate t ...

levels are usually either .05 or .01. In the figure, the placement of the alpha level shows how type I and type II errors can be ...

value “C.” How would the decision about the null hypothesis be affected by either of these two alphas? If the alpha level is set ...

The Language of Inferential Statistics A unique language is used by statisticians to communicate statistical data. A variety of ...

When all four conditions are not met, researchers must use less powerful tests known as nonparametric tests. Nonparametric stati ...

What is the hypothesis asking? Is there a difference between the groups? Is there a relationship among the variables? 1 Group 2 ...

this text to elaborate on all the tests listed in the table, information about some of the most common tests is worth rememberin ...

occur if the null hypothesis were true. Observed and expected frequencies are entered into contingency tables, and a Chi-square ...

measured more than two times (Hayes, 1994; Plichta & Kelvin, 2013). The broad question being answered is whether group means ...

Testing for Relationships Among Variables To find whether there are relationships among variables, a variety of statistical test ...

Multiple Regression A change in one variable is usually the result of many factors. Thus, when researchers want to study the rel ...