Chapter 15 Statistical Evaluation Of Data, Exams of Nursing

Chapter 15 Statistical Evaluation Of Data

Typology: Exams

2023/2024

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Chapter 15 Statistical Evaluation Of Data
Descriptive Statistics - correct answer โœ”โœ”Statistical methods used to organize, summarize, and simplify
the results obtained from research studies.
Inferential Statistics - correct answer โœ”โœ”Statistical methods used to determine when it is appropriate to
generalize the results from a sample to an entire population.
Statistic - correct answer โœ”โœ”A summary value that describes a sample.
Parameter - correct answer โœ”โœ”A summary value that describes a population.
Central Tendency - correct answer โœ”โœ”A statistical measure that identifies a single score that defines the
center of a distribution. It provides a representative value for the entire group.
Mean - correct answer โœ”โœ”A measure of central tendency obtained by adding the individual scores and
dividing the sum by te number of scores.
Median - correct answer โœ”โœ”A measure of central tendency that identifies the score that divides the
distribution in half so that 50% of the individuals have scores at or below the median.
Mode - correct answer โœ”โœ”A measure of central tendency that identifies the most frequently occurring
score in the distribution.
Variability - correct answer โœ”โœ”A measure of the size of the spread of score in a distribution.
Variance - correct answer โœ”โœ”A measure of variability obtained by computing the average squared
distance from the mean.
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Chapter 15 Statistical Evaluation Of Data

Descriptive Statistics - correct answer โœ”โœ”Statistical methods used to organize, summarize, and simplify the results obtained from research studies. Inferential Statistics - correct answer โœ”โœ”Statistical methods used to determine when it is appropriate to generalize the results from a sample to an entire population. Statistic - correct answer โœ”โœ”A summary value that describes a sample. Parameter - correct answer โœ”โœ”A summary value that describes a population. Central Tendency - correct answer โœ”โœ”A statistical measure that identifies a single score that defines the center of a distribution. It provides a representative value for the entire group. Mean - correct answer โœ”โœ”A measure of central tendency obtained by adding the individual scores and dividing the sum by te number of scores. Median - correct answer โœ”โœ”A measure of central tendency that identifies the score that divides the distribution in half so that 50% of the individuals have scores at or below the median. Mode - correct answer โœ”โœ”A measure of central tendency that identifies the most frequently occurring score in the distribution. Variability - correct answer โœ”โœ”A measure of the size of the spread of score in a distribution. Variance - correct answer โœ”โœ”A measure of variability obtained by computing the average squared distance from the mean.

Standard Deviation - correct answer โœ”โœ”A measure of variability that describes the average distance from the mean; obtained by taking the square root of the variance. Correlation - correct answer โœ”โœ”A statistical value that measures and describes the direction and degree of relationship between two variables. The sign (+/-) indicates the direction of the relationship. The numerical value (0.0 to 1.0) indicates the strength or consistency of the relationship. The type (Pearson or Spearman) indicates the form of the relationship. Also known as correlation coefficient. Regression - correct answer โœ”โœ”A statistical technique used for predicting one variable from another. The statistical process of finding the linear equation that produces the most accurate predicted values for Y using one predictor variable, X. Multiple Regression - correct answer โœ”โœ”A statistical technique used for studying multivariate relationships. The statistical process of finding the linear equation that produces the most accurate predicted values for Y using more than one predictor variable. Sampling Error - correct answer โœ”โœ”The naturally occurring difference between a sample statistic and the corresponding population parameter. Hypothesis Test - correct answer โœ”โœ”An inferential statistical procedure that uses sample data to evaluate the credibility of a hypothesis about a population. A hypothesis test determines whether research results are statistically significant. Standard Error - correct answer โœ”โœ”A measure of the average or standard distance between a sample statistic and the corresponding population parameter. Test Statistic - correct answer โœ”โœ”A summary value computed in a hypothesis test to measure the degree to which the sample data are in record with the null hypothesis. Alpha Level, Or Level Of Significance - correct answer โœ”โœ”In a hypothesis test, the criterion for statistical significance that defines the maximum probability that the research result was obtained simply by chance. Also known as level of significance.

Degrees Of Freedom - correct answer โœ”โœ”df; The value n-1 when the variance is computed for a sample of n scores. In general, the number of independent elements when a sample statistic is computed Line Graph - correct answer โœ”โœ”A display in which points connected by straight lines show several different means obtained from different groups or treatment conditions. Also used to show different medians, proportions, or other sample statistics Scatter Plot - correct answer โœ”โœ”A graph that shows the data from a correlational study. The two scores for each individual appear as a single point in the graph with the vertical position of the point corresponding to one score and the horizontal position corresponding to the other Pearson Correlation - correct answer โœ”โœ”A correlation used o evaluate linear (straight-line) relationships Spearman Correlation - correct answer โœ”โœ”A correlation used with ordinal data or to evaluate monotonic relationships Regression Equation - correct answer โœ”โœ”The equation from a regression analysis Slope Constant - correct answer โœ”โœ”In the liner equation Y = bX + a, b descries the slope of the line (how much Y changes when X is increased by 1 point) Y-Intercept - correct answer โœ”โœ”In the liner equation Y = bX + a, a, the Y-intercept, is the point at which the line intersects the Y-axis Multiple-Regression Equation - correct answer โœ”โœ”The resulting equation from a multiple regression analysis Null Hypothesis - correct answer โœ”โœ”In a hypothesis test, a statement about the population(s) or treatments being studied that says there is no change, no effect, no difference, or no relationship Effect Size - correct answer โœ”โœ”The measured magnitude of a treatment effect or relationship that is not influenced y factors such as sample size

Cohen's d - correct answer โœ”โœ”A standard measure of effect size computed by dividing the sample mean difference by the sample standard deviation Percentage Of Variance Accounted For - correct answer โœ”โœ”The percentage of variance for one variable that can be predicted using the known values for the second variable Independent-Measures t Test - correct answer โœ”โœ”In a between-subjects design, a hypothesis test that evaluates the statistical significance of the mean difference between two separate groups of participants Repeated-Measures t Test - correct answer โœ”โœ”In a within-subjects or matched-subjects design, a hypothesis test that evaluates the statistical significance of the mean difference between two sets of scores obtained from the same group of particiapnts Single-Factor Analysis Of Variance - correct answer โœ”โœ”One-Way ANOVA; A hypothesis test that evaluates the statistical significance of the mean differences among two or more sets of scores obtained from a single-factor multiple-group design Parametric Test - correct answer โœ”โœ”A hypothesis test that uses sample means or sample correlations to evaluate a hypothesis about the corresponding population. __________ tests rely on sample data consisting of numerical scores Nonparametric test - correct answer โœ”โœ”A hypothesis test that does not require numerical scores and does not involve a hypothesis about specific population parameters. The chi-square test for independence is an example of a _____________ test Chi-Square Test For Independence - correct answer โœ”โœ”A hypothesis test that evaluates the statistical significance of the differences between proportions for two or more groups of participants Split-Half Reliability - correct answer โœ”โœ”A measure of reliability obtained by splitting the items on a questionnaire or test in half, computing a separate score for each half, and then measuring the degree of consistency between the two scores for a group of participants Spearman-Brown Formula - correct answer โœ”โœ”A formula for computing split-half reliability that corrects for the fact that individual scores are based on only half of the total test items