Exam 11: Understanding Statistics in Research

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?

Based on study data,a researcher predicts that a population mean will fall within a specific range of data.This is called the:

Which is true about a Z-score?

In a data set that has a normal distribution what percent of scores will be within two standard deviations above or below the mean?

To measure test-retest reliability of an instrument,a researcher may use the:

An important goal of inferential statistical analysis is to:

Which is true about a correlational analysis technique?

A researcher plans to apply a one-tailed test of significance when analyzing data from a study.Which is true about using this test?

A researcher collects scores measuring weight among school-age children who are in an obesity prevention program and notes that several students are morbidly obese with the majority of students falling within or below the 85th percentile for weight.The scores from the morbidly obese children will affect which measure of central tendency the most?

In a discussion that includes the analysis of data collected during a pilot study,the researcher discusses the relationships and differences in data sets and makes predictions based on this analysis.The researcher will use which process?

Which of the following is not one of the components of power analysis?

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

A researcher analyzes scores from two studies in which patients' temperatures were measured after antipyretic medications are given.One study measures temperatures in centigrade and the other in Fahrenheit.The researcher will:

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 0.18.The nurse may conclude that:

In a study comparing weight gain between small-for-gestational-age (SGA)infants who were breastfed and SGA infants who were fed formula,researchers noted increased weight gain in infants who were held more regardless of how they were fed.This finding is an example of a:

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

A researcher conducts a study and calculates a mean value of 100 in a set of scores ranging from 90 to 300.Which other measure will the researcher report when describing central tendency in this data set?

Which is true about the measure of a data set's range?

The concept of degrees of freedom refers to:

A researcher develops a study to examine the effects of Keep Yourself Safe Screening (KYSS)on the incidence of intimate partner violence (IPV).The study level of significance is 0.05.The null hypothesis,that KYSS will have no effect on IPV,is found to be true.When reviewing the study for Type II errors,the reviewer understands that: