Exam 11: Understanding Statistics in Research

A researcher notes that 2 subjects in an experimental group had scores similar to those in the control group,while the other 20 experimental group subjects had scores far different from those in the control group.The researcher would consider the scores for the two subjects as:

In statistical analysis of data,the alpha value is used to:

It is important to know the demographic variables among study subjects in order to:

A data set is found to approximate a normal curve and has a mean of 72.5 and a standard deviation of 10.8.In which range of numbers will 99% of the scores fall?

An appropriate level of significance for nursing research is either:

A researcher wishes to display scores representing the relationship between two variables.Which will the researcher use?

What is the purpose of using exploratory analysis in a research report?

Clinicians now can calculate a person's myocardial infarction risk by evaluating several known risk factors,such as cholesterol levels and diabetes.This is possible because of:

A researcher wishes to present data identifying pain scores for a group of subjects using a grouped frequency distribution table.Which is true about using this method?

When comparing a study with a level of significance of 0.05 with a study having a level of significance of 0.01,the researcher knows that the study with the level of significance of 0.05 is more likely to have a:

The median scores of two groups participating in a study are exactly the same for a particular variable.This suggests that the:

A researcher studying subjects who have pulmonary disease presents a data set to describe the different conditions the subjects experience and reports the following data.Which number represents the mode for this data set? $\quad$ Asthma 4 $\quad$ COPD 6 $\quad$ Chronic bronchitis 4 $\quad$ Pulmonary hypertension 7

A researcher has calculated a variance of 9 for a data set.What is this data set's standard deviation?

In research,the probability that any data score will be within a certain range of a mean value is calculated based on the theory of:

A researcher will present demographic data about ethnicity,gender,and diagnoses about a study population using which method?

A researcher correlates self-confidence measures with obesity rates and determines an r value of 0.8.What can the reviewer conclude when evaluating this research?

Which is true about the variance for scores in a data set?

A researcher studies the effects of a nursing intervention on a desired patient outcome and discovers a statistically significant difference between groups receiving the intervention and those not receiving the intervention.The researcher concludes that the intervention is effective.This researcher has made a:

A researcher collects the following scores on a set of ranked data.Which is the median score? A.2 B.5 C.6 D.7 E.10 F.15 G.18 H.21

A researcher conducts an experimental study on patients at different outpatient clinics,including clinics in inner city,suburban,and rural locations.To help ensure that differences in scores are not related to clinic location,the researcher will apply which technique?