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Module 8 Statistics Statistical significance - Not likely to have occurred just by random chance; Often used term in scientific studies; Something other than chance is happening. Hypothesis test - Series if steps that allow us to establish statistical significance Null hypothesis - Beginning a claim; Status quo idea; Usually the parameter is equal to specific ways. What allows establishment of sampling distribution? - Null distribution Alternative Hypothesis (H1 or H...

Module 7 Statistics Review Type 1 Error ANS: When we reject the null when it's actually tru Type 11 Error ANS: Fail to reject the null, when it's actually false Alpha value to avoid a Type 1 error ANS: .10 Alpha value to avoid a type 11 error ANS: .01 How to increase power ANS: 1. Increase alpha level 2. Increase effect size 3. Increase sample size (best option) Interpret P-Value ANS: If the null hypothesis is true, there is a p% chance of seeing results such as t...

Statistics Module 7 (Questions and Answers A+ Graded 100% Verified) Seven steps of hypothesis testing 1. state Ho and Ha hypothesis, and test statistic 2. state level of significance 3. state whether one tailed or two tailed test 4. compute test statistic 5. determine degrees of freedom 6. obtain critical value from the distribution table 7. compare and decide whether to accept/reject Ho hypothesis and significant/non significant when is t test appropriate? - when we wa...

Module 6 Statistics (A+ GRADED 100% VERIFIED) Regression analysis CORRRECT ANSWER: A statistical analysis tool that quantifies the relationship between a response a response variable and one or more explanatory variable. simple linear regression CORRRECT ANSWER: A prediction of one response variable's value for one or more explanatory variable' value when there is a linear relationship between two variables. regression line CORRRECT ANSWER: The line of best fit to show the rela...

Module 6: Statistics (A+ Graded 100% Verified) Data Ans: Information, especially numerical information. Usually organized for analysis. Mean Ans: The sum of a set of numbers divided by the number of elements in the set. (A type of average) Median Ans: The middle number in a data set when data is arranged from least to greatest; if the data set has an even number of items, find the mean of the two middle numbers. Mode Ans: The most frequently occurring number(s) or item(s) in ...

Statistics Module 6 (A+ Graded 100% Verified) P-value Ans: The probability that a result was caused by chance. observational study Ans: The researcher observes if there is an association between variables. There is no treatment or control group. population Ans: An entire pool from which a sample is drawn. causation Ans: A relationship of cause and effect between two or more variables. simple linear regression Ans: The prediction of one response variable's value from one or...

REAL 110 Module 5 (Questions and Answers A+ Graded 100% Verified) 1. According to what Valuation Principle will a buyer not pay more for a property than it would cost to acquire an equally desirable substitute property with similar features A. Anticipation B. Substitution C. Conformity D. Contribution CORRECT ANSWER: B. Substitution 2. An appraiser has selected two sales properties that are alike except for one feature. Comparing the two sales to derive a market adjustment for...

Stats module 5 (A+ Graded 100% Verified) one tailed test Ans: 1-2a two tailed test Ans: 1-a significance level if type 1 is worse Ans: 1% significance level if type 2 is worse Ans: 10% significance level if both are the same Ans: 5% if p value is less than significance level Ans: reject the null hypothesis If p-value is greater than the significance level Ans: we fail to reject the null hypothesis if you reject the null Ans: there is sufficient evidence ...

Intro to Statistics Module 5 (A+ Graded 100% Verified) Random Variable Correct Ans: a variable (typically represented by x) that has a single numerical value, determined by chance, for each outcome of a procedure. Probability Distribution Correct Ans: a description that gives the probability for each value of the random variable. It is often expressed in the format of a graph, table, or formula. Discrete Random Variable Correct Ans: collection of values that is finite or counta...

Statistics - Module 4 (Questions and Answers A+ Graded 100% Verified) Data Ans: are factual information, especially information organized for analysis or used to make decisions. Discrete data Ans: count(e.g., the number of patients on a ventilator, the number of patients with central lines) Continuous data Ans: measure(e.g., rate of surgical site infections among patients undergoing colorectal surgical procedures) data set Ans: is a group of observations whose individual ...