bst322 Final Questions And Answers 2023

Information collected in a numerical form is called - quantitative Which measure of central tendency is at the highest point on a graph? - mode Correlation coefficient tests allow you to determine if a cause and effect relationship is present. - false Data that are categorical but can be rank-ordered in a meaningful way are called: - ordinal If the mean is to the left of the median, what is true? - The distribution is negatively skewed. Which measure of variability is used most often in conjunction with the mean? - standard deviation A variable with equal distances between score units which also has a true meaningful zero is: - ratio When calculating a Pearson's correlation coefficient, it is necessary that both variables have approximately normal distributions. - True In a study that examines the effect of a peer mentor on the emotional status of patients, what is the dependent variable? - emotional status Which quartile has the same value as the median? - 50% The third quartile is: - the point below which 75% of the scores lie. Statistics that allow for inferences to be made about a population from the study of a sample are known as: - inferential What is the best description of the distribution below? __/_ - leptokurtic The variable "Group assignment" is an example of what level of measurement? - nominal The measure of central tendency that is the point at which half the scores fall above and half the scores fall below is the: - median The variable "religion" is an example of what level of data? - nominal The standard deviation is: - the square root of the variance The variable "miles per hour" is an example of what level of data: - ratio What percent of the children in the study are Hispanic? - 19% (in quiz's chart) The mean and the mode are always the same for a dataset of over 10 values. - false If you wanted to test a set of patients' responses to a given therapy at 1, 3, and 6 months, you would use which statistical test? - Repeated measures ANOVA Nurse researchers hypothesized that the use of therapeutic touch would reduce anxiety levels in pre-op hip replacement patients. The null hypothesis would be: - Therapeutic touch does not reduce anxiety levels in pre-op hip replacement patients. 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: - One-way ANOVA If a researcher rejects a null hypothesis when that hypothesis is actually true, he has committed: - a type I error When the alternative hypothesis states that the difference between two groups can only be in one direction, we call this a: - One-tailed test What does it mean if your test result is "statistically significant"? - It is unlikely that the results occurred by chance alone. The area of a sampling distribution beyond which the null hypothesis is rejected is known as the: - Critical region In inferential statistics, the objective is to determine how probable it is that - The null hypothesis is false. If a researcher accepts a null hypothesis when that hypothesis is actually false, he has committed: - a type II error Level of significance is symbolized by: - a (alpha) The Central Limit Theorem states: - The mean of a sampling distribution of means is equal to the population mean.