Categorial variable - Study guides, Class notes & Summaries

AP Stat - Chapters 1-4 - Multiple Choice - Cumulative Testthe following histogram represents the distribution of acceptance rates (% accepted) among 25 business schools in 1997, what % of schools have an acceptance rate above 40% - correct answer know how to read a histogram (variable vs. freq, fraction -> %) you want to use numerical summaries to describe a distribution that is strongly skewed to the left, which combination of measure of center and spread would be the best to use (mean an...

what is bias? - error that is built into the study causes the results to be different from the truth (overestimation or underestimation of the association between exposure and outcome) where is the best place to prevent bias during a study? - the design stage (before you even look for results) name the four type of bias common in cross-sectional studies - selection bias interpretation bias recall bias non-response bias name the common types of bias in case-control studies? - selection b...

The following weights were recorded for children in a pediatrician's office:93, 84, 70, 48, 59, 66, 88, 94, 84, 67, 74, 58, 82. The analyst wants to see the distribution of the weights, but still be able to see the individual values.Which method of display should be used? - correct answer stem plot The following heart rates were recorded for patients in an intensive care unit:98, 88, 74, 83, 76, 99, 81, 73, 60, 66, 88, 94, 73, 82, 95, 85, 76Whic...

The 5 steps of the statistical process are Design the study, Collect the data, Describe the data, Make inferences, Take action. Categorial variable data that can be placed into groups on the basis of some qualitative property. quantitative variable a characteristic that can be measured numerically observational study research that gathers data in a real-world setting without intentionally manipulating any variable experimental study A study in which the researcher manipulates one of th...

Objective of Linear Discriminant Analysis - - Predict group membership for a number of subjects from a set of predictor variables - The criterion (grouping) variable is the object of classification. Always a categorial variable - Constructs one or more discriminant equations such that different groups differ as much as possible Number of discriminant functions - min(number of groups -1, p) p = predictor variables Determine discriminant weights by... - ... having a training set...

Statistics - ANSWERSthe science of collecting, organizing, summarizing and analyzing information to draw conclusions or answer questions. In addition, it is about providing a measure of confidence in any conclusions. population - ANSWERSthe entire group of individuals that we want information about sample - ANSWERSthe part of the population that we actually examine in order to gather information parameter - ANSWERSa number that describes the entire population statistic - ANSWERSa num...

PSYC 350 Study Guide Exam| Question & Correct Answer (Verified) Set of Correlations - CORRECT ANSWER-With a group of variables, which would be most correlated 2xk Chi-square - CORRECT ANSWER-If you have a 2 categorial qualitative variable (gender) and a k categorical qualitative variable (3 or more of something) k-WG ANOVA - CORRECT ANSWER-Repeated measures; same group is tested 3 or more time

ACRP CCRC Final Exam Practice Questions and Answers Latest Updated 2023/2024. Which conditions should be fulfilled when enrolling a subject into your trial? - Answer - Subject meets all inclusion criteria - Subject has given written informed consent You've been delegated to handle the storage and inventory of IP. The study drug must be stored below 25C/77F. On a summer Monday morning you discover that the temperature recording machine in the storage room has failed so you doin't know wha...

The prediction intervals need to be corrected for simultaneous inference when multiple predictions are made jointly. - ANSWER- The estimated versus predicted regression line for a given x* - ANSWER- If the confidence interval for a regression coefficient contains the value zero, we interpret that the regression coefficient is definitely equal to zero. - ANSWER-False The larger the coefficient of determination or R-squared, the higher the variability explained by the simple linear regres...

2 monosaccharides coming together? - CORRECT ANSWERS disaccharide A chain of the same or similar building blocks covalently bonded together - CORRECT ANSWERS polymer A hypothesis is never ___________ but it may be __________ - CORRECT ANSWERS - proven - supported A probability that the magnitude of the effect could be due to chance (=test statistic/df) - CORRECT ANSWERS P-value A single protein molecule that assembles with other protein molecules to form a protein complex - CORRECT ...