Exam 11: Understanding Statistics in Research

A researcher evaluates the internal consistency (reliability)a newly developed scale used in a pilot study and notes a Cronbach alpha coefficient of space 0.72.The researcher will

Which describes the mode of a data set?

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

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

Which is true about a sample that is heterogeneous?

A nurse conducts a study to evaluate the likelihood that single adolescent mothers will breastfeed their newborn infants if they are given materials about the benefits of breastfeeding.The results show a P value of .18.The nurse may conclude that

A researcher conducts a power analysis for a study in which there was no difference between control and experimental group scores and identifies a power level of 0.75 and a level of significance of 0.05.What will this researcher do?

A parameter is a characteristic of

Which circumstance will call for the use of analysis of variance (ANOVA)?

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

A researcher calculates a Pearson product-moment coefficient of 0.2.The reviewer understands that this value represents

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?

A review of demographic data shows that mothers with higher levels of education have fewer children.This represents which type of relationship?

The analysis of a nondirectional hypothesis is called a

What is true about the Chi-square test of independence?

After a clinical drug trial to measure the effects of atorvastatin administration on low-density lipoprotein levels,which of the following conclusion statements is acceptable in the research report?

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

It is important to know the demographic variables among study subjects to

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?

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