Hypothesis Testing Problems - Z Test & T Statistics - One & Two Tailed Tests 2
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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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Gold is the most expensive it's ever been. On September 2, 2025, the price of the precious metal hit $3,508.50 per ounce. It's reached record highs several times this year. The high price is pushing more people to invest in it — buying gold from Costco, selling gold jewelry, and extracting gold from electronic waste. But this modern-day gold rush is also leading to consequences in Africa's gold-rich nations. In Liberia, foreign mining companies have moved in to extract the resource to meet the g
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