Publications by Ryan OHara
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Part 1 Correlation: Simply put, correlation is the relationship between two or more things. In statistics, it describes or is a measure of the association between two variables. It usually ranges on the scale from -1 (negative/inverse) to 1 (positive/direct) relationships. It is important to note that correlation can indicate a relationship, b...
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Homework4
Setting up the Environment # Clear the workspace rm(list = ls()) # Clear environment gc() # Clear unused memory ## used (Mb) gc trigger (Mb) max used (Mb) ## Ncells 525004 28.1 1169818 62.5 660385 35.3 ## Vcells 964354 7.4 8388608 64.0 1769489 13.6 cat("\f") # Clear the console I. Function to Reject or...
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Discussion11
Import the Data library(tidyverse) ## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ── ## ✔ dplyr 1.1.3 ✔ readr 2.1.4 ## ✔ forcats 1.0.0 ✔ stringr 1.5.0 ## ✔ ggplot2 3.4.3 ✔ tibble 3.2.1 ## ✔ lubridate 1.9.3 ✔...
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Document
Clear R rm(list = ls()) #clear environment gc() #clear unused memory ## used (Mb) gc trigger (Mb) max used (Mb) ## Ncells 523150 28.0 1164521 62.2 660385 35.3 ## Vcells 952553 7.3 8388608 64.0 1769489 13.6 cat("\f") #clear console #Import Packages library(ggplot2) library(dplyr) ## ## Attaching package: 'dplyr' ## The fo...
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Discussion9
Part 1: Law of Large Numbers The Law of Large Numbers is a probability Theorem that describes the long term behavior of a probability experiment. The law states that if an independent experiment is repeated over a long period of time, the mean of the results should converge/approach the expected value of that experiment. There are two version...
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Discussion8
PART 1 1a. Probability Sampling: Probability sampling is a method that uses random sampling. This means that each member of the population being studied must have an equal chance of being selected. There is simple random sampling (random number generator), stratified (random sample within strata), systematic (randomly selecting at intervals), ...
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Midterm1
rm(list = ls()) #remove all objects from the environment cat("\f") # clear the console graphics.off() # clear all graphs Import the Packages Needed library(psych) library(moments) library(dplyr) ## ## Attaching package: 'dplyr' ## The following objects are masked from 'package:stats': ## ## filter, lag ## The following objects are ma...
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Data Analysis Homework 3
Question 1. 1. A researcher wishes to conduct a study of the color preferences of new car buyers. Suppose that 50% of this population prefers the color red. If 20 buyers are randomly selected, what is the probability that between 9 and 12 (both inclusive) buyers would prefer red? Round your answer to four decimal places. Use the round() func...
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I. Foundation Distributions Normal Distribution (continuous): The normal distribution is one of the most, if not the most, common distribution of random variables (shows up a lot in nature). The normal distribution is a continuous distribution type (ex. weight, height), symmetric about the mean, asymptotic to the horizontal axis, unimodal, a f...
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Part I. Bayes Theorem is an extension of the Law of Conditional Probability. It is used to calculate a conditional P of a condition with evidence present. The prior probability (before the evidence) (usually P(A)), is multiplied by a fraction representing the “strength of the evidence” (P(B|A)/P(B). In other words, it is the probability of ...
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