{"id":261723,"date":"2024-04-07T19:52:02","date_gmt":"2024-04-07T19:52:02","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/?p=261723"},"modified":"2024-04-07T19:52:02","modified_gmt":"2024-04-07T19:52:02","slug":"how-to-find-p-value-given-z-on-ti-83","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/how-to-find-p-value-given-z-on-ti-83\/","title":{"rendered":"How to find p value given z on TI-83?"},"content":{"rendered":"

How to find p value given z on TI-83?<\/p>\n

When conducting statistical analyses, determining the p-value is a crucial step to make informed decisions and draw accurate conclusions. The p-value represents the probability of obtaining a test statistic as extreme as the observed value, assuming the null hypothesis is true. The TI-83 calculator provides a convenient way to compute the p-value given a z-score. Here’s a step-by-step guide on how to find the p-value using a TI-83 calculator:<\/p>\n

1. Turn on the calculator and select the “DISTR” key, which is located above the “VARS” key.
\n2. Scroll down to locate and select the “invNorm” function.
\n3. You will see a prompt with the form “invNorm(area to the left, mean, standard deviation).” Here’s where we enter the information required to find the p-value.
\n4. Input the area to the left of the z-score, which is the probability of observing a value less than the given z-score. This area is typically denoted as \u03b1, the significance level or the alpha level.
\n5. For a two-tailed test (where the null hypothesis is not one-sided), divide the significance level by 2 to account for the area in both tails. For example, if \u03b1 = 0.05, enter 0.05\/2 = 0.025.
\n6. The mean and standard deviation are usually not necessary for finding the p-value using the z-score. Hence, you can leave these values blank (just press the comma key or “2nd,” followed by the comma key twice) since the standard normal distribution has a mean of 0 and a standard deviation of 1.
\n7. Press the “Enter” key, and the calculator will provide the z-score corresponding to the probability entered in Step 4.
\n8. To find the p-value, subtract the obtained z-score from 1. This is because the area under the curve always sums up to 1, and we are interested in the probability in the tail(s) beyond the z-score.
\n9. Round the p-value to the desired decimal places for better interpretability.<\/p>\n

**Ultimately, to find the p-value given a z-score on a TI-83 calculator, follow these steps:**
\n1. Press “DISTR” and select “invNorm.”
\n2. Enter the area to the left of the z-score or significance level.
\n3. Leave the mean and standard deviation fields blank.
\n4. Press “Enter” to find the corresponding z-score.
\n5. Subtract the obtained z-score from 1 to find the p-value.
\n6. Round the p-value to the desired decimal places.<\/p>\n

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