Publications by Mr. Hern
Lab 5.1 Key
In this lab, we use the PostSurvey dataset to explore the process of independent t-testing in the context of statistical inference and hypothesis testing; specifically, we examine data about sleep time for students living in fraternities/sororities vs. students who don’t lead trivial, adolescent lives. Lab Question Do college students in frater...
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Homework 5.1 Key
Introduction We apply our understanding of independent t-tests to two scenarios, along with a random question about directional hypothesis testing. The Beatings Will Continue Until Your Self-Esteem Improves Overview for Questions 1 - 8 Scenario 1: In a research study on self-esteem, 30 middle school students had a mean score of 81, with s (standar...
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Lesson Check 5.1 Key
Introduction In this lesson check we expand our knowledge of t-tests to the third type: independent t-tests. Like paired t-tests, independent t-tests are applicable to two datasets, but we will review the key distinction, independent groups, before embarking on an example. Question 1 For each scenario below, identify whether the groups are indepen...
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Nutrition Project Key
In this project, we collect nutrition information from a sample of frozen and canned peas and compare the mean protein level of our sample to the USDA average value of protein for all offerings of peas to evaluate whether or not the USDA average is reflective of all peas products. Research Question Does a sample of frozen and canned peas offered b...
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Homework 2.3 Key
Introduction We seek a deeper understanding of our measurements of center and spread through a series of what might be thought of as statistical brain teasers. Question 1 What does it mean for a sample to have a standard deviation of zero? The center of the distribution is at zero. The mode is also zero. The distribution is perfectly symmetrical ...
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Lesson Check 2.3 Key
Introduction We explore center and spread visualizations and analysis involving non-normal data like right- or left-skewed distributions. Question 1 Which of the following are characteristics of a Normal distribution? Select all that apply. Half the data values are positive, and half the data values are negative. The scores are symmetrical around...
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Homework 2.2 Key
Introduction Additional exercises to explore the measures of center and spread that will be used throughout the course. The bulk of the assignment centers on two scenarios involving basketball free throws and an art history quiz. Question 1 A sociology professor tells her class, “Even now in the US, women still typically earn less than men in th...
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Lesson Check 2.2 Key
Introduction Mean, median and mode really get to the heart of statistics, pun intended. We have an opportunity to explore these measurements and familiarize ourselves with the important roles they play. Question 1 A real estate agent claims that, all things being equal, houses with swimming pools tend to sell for more than houses without swimming ...
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Homework 2.1 Key
Introduction A wide-ranging introduction to visualizations with a number of realistic scenarios to interpret, analyze and refine data presented. Naming Names Overview for Questions 1 - 3 The following is a frequency distribution of the number of letters in the first name of a sample of students: Name Length Frequency 1 1 2 2 3 17 4 35 5 41 ...
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Lesson Check 2.1 Key
Introduction A wide-ranging introduction to visualizations with a number of realistic scenarios to interpret, analyze and refine data presented. This Place Is Going to the Dogs Overview for Questions 1 - 4 Below is a histogram showing the number of vaccinations received by a sample of dogs in the local animal shelter. Question 1 According to the ...
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