Iqr - Study guides, Class notes & Summaries

A summary for Introduction to Qualitative Research (IQR) of the videos and professor's comments for weeks 1 through 7.

Marginal Distribution correct answer: The distribution of values of a variable among all individuals described by the table. (Percent of something out of the total) Conditional Distribution correct answer: The distribution of values of a variable among individuals who have a specific value of another variable. (Percent of a specific something out of that specific total) Association correct answer: When specific values of one variable tend to occur in common with specific values of anoth...

How do you check if there is outliers?calculate IQR; anything above Q3+1.5(IQR) or below Q1-1.5(IQR) is an outlier If a graph is skewed, should we calculate the median or the mean? Why?median; it is resistant to skews and outliers If a graph is roughly symmetrical, should we calculate the median or the mean? Why?mean; generally is more accurate if the data has no outliers What is in the five number summary?Minimum, Q1, Median, Q3, Maximum Relationship between variance and standard devia...

How to describe a 1-variable distribution correct answer: SOCS + context Ways to describe the shape of a distribution (S) correct answer: Symmetric = balanced on both sides of the center Skewed right = tail (part with less stuff) is located to the right of the center Skewed left = tail is located to the left of the center When describing this part of a distribution, always use -ly words in your description (fairly, slightly, strongly, appropriately, etc.) Outlier Formula (3rd Qu...

Measures Central Tendency Mean, Median, Mode Measures of Variation STD Deviation & Variance; Range & IQR Measures of Position Quartiles, Percentiles, Z‐Scores Central Tendency A measure of central tendency represents the center or middle of the data Population Parameter a number calculated from all the population measurements that describes some aspect of the population Population Mean (μ) Master01 | September, 2024/2025 | Latest update 1 | P a g e | © copyright 2024/202...

YESHIVA UNIVERSITY ISDS 361A FINAL EXAM 2024 WITH 100% CORRECT ANSWERS The collection of all units of interest in a particular study is called a. Sample b. Parameter c. Population d. Statistic - correct answer Population Suppose there is a dataset of baseball scores from several matches between the Seattle Mariners and Anaheim Angels. A statistician wants to summarize the data using graphical and numerical measures. What branch of Statistics will she need to use? a. Descriptive St...

To describe categorical data... correct answer: Make a picture. Bar graphs or pie charts work well. Summarize the distribution with a table of counts or relative frequencies (percents) in each category. Compare distributions with plots side by side. Interpret Standard Deviation correct answer: Standard deviation measures spread by giving the "typical" or "average" distance that the observations (context) are away from their (context) mean. Outlier Rule correct answer: Upper Bound ...

Straighterline Introduction to Statistics Questions and Answers Already Passed Four steps in the process of statistics 1. Producing Data 2. Exploratory Data Analysis 3. Probability 4. Inference Categorical variable places individuals into one of several groups Two types: nominal and ordinal Quantitative Variable represents a measurement or a count Two types: Interval and ratio Nominal Variable categorical variables where there is no natural order among the categories Ordinal...

1. Which of the following statistics are unaffected by a single large outlier? (More than one) * Median, mode, Interquartile range (IQR) 2. Which of the following is most suitable for policy making based on income distribution? * Median Because of assumed skewed distribution 3. If we study data from a population whose mean is 200 and standard deviation is 30, which of the following data points has a z-score of -3? * 110. 4. Which of the following statistics measures the spread of the d...

UGBA 104 Midterm Exam Questions and Answers 100% Verified calculate outliers IQR method - CORRECT ANSWER-IQR below; Q1 - 1.5 * IQR IQR above; Q3 + 1.5 * IQR how to calculate percentiles - CORRECT ANSWER-percentile (L) = (n+1) * P/100 calculate z score outlier - CORRECT ANSWER-(value-mean)/SD rule of thumb for z score outlier - CORRECT ANSWER-above or below 3 SDs away which outlier method is more lenient - CORRECT ANSWER-z score, it goes further from mean than the IQR method ie the IQR...