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In the following z-table, we are highlighting how to determine the area to the left of z = 2.34. Notice how we separated 2.34 into 2.3 and 0.04. Then, we look for 2.3 in the first column and 0.04 on the first row. The intersection of these two locations in the table will be the p-value to the left of z. This means that P(z < 2.34) = 0.99036. In the following z-table, we are highlighting how to determine the area to the left of z = -1.86. Notice how we separated -1.86 into -1.8 and 0.06. Then, we look for -1.8 in the first column and 0.06 on the first row. The intersection of these two locations in the table will be the p-value to the left of z. This means that P(z < -1.86) = 0.03144. You can find an unblurry version of the z-table at https://www.math.arizona.edu/~rsims/ma464/standardnormaltable.pdf.

Here is a list of the most common confidence levels and significance level alphas along with their associated critical z-values: Note: One-tailed significance level alphas are associated with left-tailed and right-tailed tests .

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What's up Nixers! In today's blog, I want to discuss with you the things that I did these past two weeks. After my encounter with my colleague, Adonis, one of our discussions focused on the creation of an app that would help ease students' struggles. He was very passionate about an app for a civil engineering application involving beams under load. As our discussions went on, I do acknowledge that if that particular app would be realized, it would really benefit civil engineering students in a profound way. What I liked about the discussion was how the app was described. Like, if I put my self in the user's perspective, the user interface which he discussed would be "user-friendly" as he really understands the flow of how things are to be calculated. As we left and went each other's ways, I was inspired by an idea to create an app utilizing the python programs that I have already developed for statistics. Like, how useful would it be for students to guide ...