BST 322 Exam Rated A+ Questions With New Update Solutions

BST 322 Exam Rated A+ Questions With New Update Solutions The variable "Group assignment" is an example of what level of measurement? - Answer- Nominal When calculating a Pearson's correlation coefficient, it is necessary that both variables have approximately normal distributions. - Answer- True Statistics that allow for inferences to be made about a population from the study of a sample are known as: - Answer- Inferential Which measure of variability is used most often in conjunction with the mean? - Answer- Standard deviation Data that are categorical but can be rank-ordered in a meaningful way are called: - Answer- Ordinal The variable "religion" is an example of what level of data? - Answer- Nominal The standard deviation is: - Answer- The square root of the variance In a study that examines the effect of a peer mentor on the emotional status of patients, what is the dependent variable? - Answer- Emotional status The variable "miles per hour" is an example of what level of data: - Answer- Ratio Information collected in a numerical form is called: - Answer- Quantitative Which measure of central tendency is at the highest point on a graph? - Answer- Mode The measure of central tendency that is the point at which half the scores fall above and half the scores fall below is the: - Answer- Median The mean and the mode are always the same for a dataset of over 10 values. - Answer- False If the mean is to the left of the median, what is true? - Answer- The distribution is negatively skewed. A variable with equal distances between score units which also has a true meaningful zero is: - Answer- Ratio The third quartile is: - Answer- the point below which 75% of the scores lie. Which quartile has the same value as the median? - Answer- 50% Correlation coefficient tests allow you to determine if a cause and effect relationship is present. - Answer- False A study in which a set of patients are tested for pain level before and after being given a new pain medication would use which test? - Answer- Dependent t-test A range of values estimated to have a high probably of containing the population value is called: - Answer- Confidence interval The area of a sampling distribution beyond which the null hypothesis is rejected is known as the: - Answer- Critical region Statistical tests that make assumptions about the underlying distributions are called: - Answer- Parametric tests If a researcher accepts a null hypothesis when that hypothesis is actually false, he has committed: - Answer- a type II error If a researcher rejects a null hypothesis when that hypothesis is actually true, he has committed: - Answer- a type I error If you wanted to compare the effect of 3 separate kinds of interventions (3 separate groups of one independent variable -the intervention type) on a single dependent variable, the appropriate test would be: - Answer- One-way ANOVA The hypothetical result of an infinite sample from a given population and calculating of some statistic from those infinite samples is a: - Answer- Sampling distribution When the alternative hypothesis states that the difference between two groups can only be in one direction, we call this a: - Answer- One-tailed test Nurse researchers hypothesized that the use of therapeutic touch would reduce anxiety levels in pre-op hip replacement patients. The null hypothesis would be: - Answer- Therapeutic touch does not reduce anxiety levels in pre-op hip replacement patients.