Hypothesis Testing Problems - Z Test & T Statistics - One & Two Tailed Tests 2
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YouTubeThe Organic Chemistry Tutor
Hypothesis Testing Problems - Z Test & T Statistics - One & Two Tailed Tests 2
This statistics video tutorial provides practice problems on hypothesis testing. It explains how to tell if you should accept or reject the null hypothesis. It gives two examples - one involving the z-test and the other involving the t-test or t-statistic. One of those examples include a one tailed test and the other contains an example of the ...
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What is an EGR Valve?💨🔧🛠️👇 EGR stands for Exhaust Gas Recirculation. It’s a part of the emission control system in petrol and diesel engines. Purpose: Reduce nitrogen oxide (NOx) emissions by recirculating some exhaust gases back into the intake manifold. --- ⚙️ How Does It Work? 1. The valve opens at certain engine conditions. 2. A controlled amount of exhaust gas mixes with fresh air-fuel mixture. 3. This lowers the combustion temperature. 4. Lower temperature → less NOx formation → cleane
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