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A Paired t-test Is Just A 1-Sample t-Test If the signal does not stand out from the noise, it’s likely that the observed difference between the sample estimate and the null hypothesis value is due to random error in the sample rather than a true difference at the population level. Relatively large signals and low levels of noise produce larger t-values. In this manner, t-values allow you to see how distinguishable your signal is from the noise. The signal is at the same scale as the noise. However, if there is a difference of the same size but your data have more variability (6), your t-value is only 1. This t-value indicates that the difference is 3 times the size of the standard error. If your signal is 6 and the noise is 2, your t-value is 3. Signal-to-Noise ratioīoth the signal and noise values are in the units of your data. We include the noise factor in the denominator because we must determine whether the signal is large enough to stand out from it. This random error is the “noise.” When there is more noise, you expect to see larger differences between the sample mean and the null hypothesis value even when the null hypothesis is true. A larger number indicates that your sample estimate is less precise because it has more random error. This statistic indicates how accurately your sample estimates the mean of the population. The equation in the denominator is a measure of variability known as the standard error of the mean. For instance, if your sample mean is 6 and the null value is 6, the difference is zero.Īs the difference between the sample mean and the null hypothesis mean increases in either the positive or negative direction, the strength of the signal increases. If there is no difference between the sample mean and null value, the signal in the numerator, as well as the value of the entire ratio, equals zero. If your sample mean is 10 and the null hypothesis is 6, the difference, or signal, is 4. You simply take the sample mean and subtract the null hypothesis value. A common analogy is that the t-value is the signal-to-noise ratio. Please notice that the formula is a ratio. ![]() I'll show you the formula first, and then I’ll explain how it works. Understanding this process is crucial to understanding how t-tests work. Let's look at how each of these t-tests reduce your sample data down to the t-value. #STATPLUS PAIRED T TEST SOFTWARE#Minitab Statistical Software offers the 1-sample t-test, paired t-test, and the 2-sample t-test. However, this post includes two simple equations that I’ll work through using the analogy of a signal-to-noise ratio. #STATPLUS PAIRED T TEST SERIES#In this series of posts, I'm focusing on concepts rather than equations to show how t-tests work. If you understand how t-tests calculate t-values, you’re well on your way to understanding how these tests work. They are called t-tests because each t-test boils your sample data down to one number, the t-value. This means we have sufficient evidence to say that the true mean test score is different for students before and after participating in the study program.In statistics, t-tests are a type of hypothesis test that allows you to compare means. Since the p-value ( 0.0101) is less than 0.05, we reject the null hypothesis.
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![]() The article will be split in three parts covering three phases of the stock’s history. ![]() In the following article, I will take a closer look at Owens & Minor and the rollercoaster ride the stock took in the last few years. (Source: Owens & Minor Investor Presentation) And especially GameStop ( GME) became extremely famous and dominated the financial press for several days in January as the stock increased about 11,000% between April 2020 and the peak in January 2021. Owens & Minor ( NYSE: OMI) as well as Bed Bath & Beyond ( BBBY) are stocks that increased more than 1,000% since the previous lows. Proven ability to analyze and conclude ability to apply Continuous Improvement methodologies and to standardize processes across multiple sites and functions.Ībility to lead and drive change among peers and direct reports.The current stock market is producing a lot of crazy stories of success and phenomenal returns and when an index – the Nasdaq-100 ( QQQ) – already increased more than 100% since the March 2020 low, we should not be surprised about several stocks also increasing in the high triple-digits (sometimes even quadruple digits). Proven team building skills, both internal and external, with the ability to motivate and direct the work of others.Įxceptional customer relationship skills.Įxcellent planning and organizational skills with demonstrated ability to direct large complex initiatives across a broad network and ensure completion. Strong financial acumen including prior profit and loss responsibilities.Ībility to work fast and effectively within a matrix environment.ĭemonstrated leadership and people management skills with an ability to lead, coach and mentor all levels of teammates. In depth knowledge of supply chain management, logistics, distribution, and/or warehouse management best practices. Or any combination of relevant education and experience to meet the above requirements #Owens minor professionalActs as the Designated Representative (DR) for the DC where required by licensing and compliance laws / regulations.ġ3 or more years of professional supply chain or warehouse operations experience, preferably within the healthcare/medical/medical device industryĦ or more years of diversified leadership, planning, communication, organization and people motivation experience Oversees DC succession planning, identifying, attracting, developing, coaching, and retaining talent.Įnsures adherence to all regulatory requirements regarding scheduled drugs, hazardous material, dating merchandise, storage requirements and reporting agencies (DOL, DEA, FDA, OSHA, etc.). Monitors and reports performance of DC, implementing root cause analysis to consistently work towards improving teammate relations, customer quality, and operational efficiency. ![]() ![]() Implements the conversion of new customers at the DC to ensure successful implementation of new business.Įnforces DC adherence to company developed SOP’s / WI’s for warehouse management and transportation. Coordinates with localĪccount Management team, and Corporate Operations as needed. Oversees all customer service for the DC, resolving issues relating to service quality, pick pack and ship requirements, and deliveries. Responsible and accountable for achieving DC operational performance Key Performance Indicators in the areas of Safety, Quality, Productivity, and Turnover. Makes capital recommendations and reviews and approves appropriate expenses for the DC. Responsible and accountable for achieving agreed upon financial goals for the DC operating expenses (Warehouse Expense, Delivery Expense, Occupancy Expense, and Inventory Shrink). Provides proactive feedback to front line Operations management, initiating management coaching, teammate performance feedback, management performance feedback, and corrective actions where needed. ![]() Directs all Operations activities and teammates within a large (based on revenue, complexity, headcount) Distribution Center (DC). ![]() ![]()
No. Wine support for The Sims 2 has been broken for many years due to The Sims 2 requesting 1024 pixel vertex shaders, yet Wine’s Direct3D implementation only providing 256. THE SIMS 2 SUPER COLLECTION FOR FREEAspyr since released the Super Collection and hence only included the Expansion + Stuff Packs they have ported (9/18).ĮA could potentially port & release the Ultimate Collection for modern Macs themselves, but this would likely take alot of work, to then release it for free probably wouldn't make much business sense.Ĭan I play The Ultimate Collection on a Mac via Wine? THE SIMS 2 SUPER COLLECTION PCSince porting those 9 EPs/SPs on disk a few years ago, Aspyr s topped porting expansion packs due to contracting and licensing agreements with EA, as EA now does all PC and Mac ports for games in house (like TS3). ![]() THE SIMS 2 SUPER COLLECTION WINDOWSWhy does the Super Collection only feature half of the Windows Ultimate Collection? NOTE: The on-disk versions of The Sims 2 Mac are not the same as the recently released Super Collection, and do not include the updated features mentioned above. To check the version of OSX you are running click the Apple logo in the top left, and go to About this Mac. No, unless your Mac runs Snow Leopard (10.6) and earlier. Apple dropped support for running PowerPC applications (like the Sims 2) in 10.7 (Lion). It features a new rendering engine, native support for retina displays, and most importantly works on modern (10.7+) Macs which the on-disk versions don't.Ĭan I buy the Mac version (and any of Aspyr's 6 expansion packs and 3 stuff packs) in a retail store, on disk, and play them on a Mac? It's available in the Mac App Store for £20.99/$29.99. Aspyr (The publisher of the on-disk Mac version) released 6 (of eight) Expansion Packs and 3 (of ten) Stuff packs for the Mac. Is there a Mac version of The Sims 2 Ultimate Collection? Mac Users have to pay £20.99/$29.99 for half the EPs/SPs. The Sims 2 is the second standalone game in The Sims series, released in 2004, with a total of eight expansion packs.Windows users (could) get the Ultimate Collection (all EPs/SPs) for free. In contrast to The Sims, the game introduced three interconnected concepts: aging, Wants and Fears, and Aspiration. (College-aged Young Adults were added in the first expansion pack, University.) Sims now age through various stages-infant, toddler, child, teen, adult, elder -and could be created in any stage except the first. They also came with an "Aspiration," an overall goal for their life: Family, Romance, Wealth, Popularity, Knowledge, and (eventually) Pleasure. ![]() Starting with the first expansion pack, this would assign the Sim a ( randomly-generated) Lifetime Wish, which keeps them happy for the rest of their lives if they achieved it. ![]() In the meanwhile, it also controlled what Wants and Fears would pop up these were general life events, from "Have First Kiss" to "Eat Trademark Favorite Food". These would contribute not only to a Lifetime Aspiration Score, which could be used to purchase various loosely realistic in-game objects (the most basic of which being a literal Money Tree), but also to the Sim's real-time Aspiration meter. This corresponded roughly to self-esteem or general mood, and could override a Sim's physical-needs total if it was high enough. Of course, it also lost XXX points every few hours, and if it hit bottom the Sim would have a Heroic BSoD ( Played for Laughs).įulfilling the Sim's lifetime wish would fill their Aspiration bar to the max for the rest of their lives, but (of course) you get a certain amount of time to do this before they croak. Meanwhile, personalities continued to be calculated on the five scales/star sign model, but gradually more features were added through expansion packs, such as the ability to gain or lose personality points under certain circumstances and the introduction of memories, turn-ons, turn-offs, attraction/chemistry, interests and hobbies. The expansion packs were named University, Nightlife, Open For Business, Pets, Seasons, Bon Voyage, Free Time and Apartment Life. ![]() |
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