T-Tests: A Matched Pair Made in Heaven: Crash Course Statistics #27
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Date: 2022-04-04
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Comments and reviews: 10
Bryan
When I put the T-statistic into the Excel formula =NORM. S. DIST(-. 321167, 1) it spits out a Pvalue of 0. 0006598, different from 0. 005823 seen at 9: 22. Is this because the probability curve in this small-sample coffee shop example is. uh. -shorter and fatter-) than a completely normal, large-sample bell curve?
Also, how would I look up the critical value for this example in a T-distribution table? What -degree of freedom- row would it be under?
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When I put the T-statistic into the Excel formula =NORM. S. DIST(-. 321167, 1) it spits out a Pvalue of 0. 0006598, different from 0. 005823 seen at 9: 22. Is this because the probability curve in this small-sample coffee shop example is. uh. -shorter and fatter-) than a completely normal, large-sample bell curve?
Also, how would I look up the critical value for this example in a T-distribution table? What -degree of freedom- row would it be under?
reply
Mewzyque
3: 11
There are two ways to determine if there is a statistically significant difference between the two coffee shops:
1. We can calculate the critical t-value and if our t-statistic is greater than the CRITICAL VALUE we reject the null hypothesis
2. We can calculate the p-value from our t-statistic and if the p-value is smaller than our chosen ALPHA LEVEL we can reject the null hypothesis
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3: 11
There are two ways to determine if there is a statistically significant difference between the two coffee shops:
1. We can calculate the critical t-value and if our t-statistic is greater than the CRITICAL VALUE we reject the null hypothesis
2. We can calculate the p-value from our t-statistic and if the p-value is smaller than our chosen ALPHA LEVEL we can reject the null hypothesis
reply
BoxySama
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You failed to capture my interest with your metaphor
when it comes to Coffee I would go much deeper in a measuring, I would learn where they're giving their beans from and the method they use to brew it. There are so many factors when it comes to coffee, that metaphor does not work
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You failed to capture my interest with your metaphor
when it comes to Coffee I would go much deeper in a measuring, I would learn where they're giving their beans from and the method they use to brew it. There are so many factors when it comes to coffee, that metaphor does not work
reply
Michael
Anyone know where she got the critical values from? I looked at the t-table for two-tailed distribution, and the values she is using do not seem to match up to a sample size of 8 and an alpha level of 0. 05. Help?
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Anyone know where she got the critical values from? I looked at the t-table for two-tailed distribution, and the values she is using do not seem to match up to a sample size of 8 and an alpha level of 0. 05. Help?
reply
Eric
Question: Calculating the 2-group standard error gives different results from calculating the 1-group standard error of the differences. Which one is used when? Is the 2-group one used when they're independent?
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Question: Calculating the 2-group standard error gives different results from calculating the 1-group standard error of the differences. Which one is used when? Is the 2-group one used when they're independent?
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Samira
Can I use pair T Test to evaluate the differences in attitudes before and after an intervention of the same class. The problem is that I did not ask them to write their names or the identifying sign
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Can I use pair T Test to evaluate the differences in attitudes before and after an intervention of the same class. The problem is that I did not ask them to write their names or the identifying sign
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Ivelin
Why is it that I can find all of that information for free but need to pay 9 grand per year to have someone teach me the exact same thing in a slightly less entertaining way?
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Why is it that I can find all of that information for free but need to pay 9 grand per year to have someone teach me the exact same thing in a slightly less entertaining way?
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Emily
Hi. I remembered Crash Course from AP classes in high school. Here I am now, as a graduate student, still watching Crash Course. Thank you for your videos. They really help!
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Hi. I remembered Crash Course from AP classes in high school. Here I am now, as a graduate student, still watching Crash Course. Thank you for your videos. They really help!
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Burandango
i literally use this as a guide to fully understand statistics inside and out. i go back and rewatch a video if i am ever having trouble. thank you!
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i literally use this as a guide to fully understand statistics inside and out. i go back and rewatch a video if i am ever having trouble. thank you!
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Not
I seem to remember from statistics class that the standard deviation of a small sample size (less than 25) was meaningless. Am I wrong?
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I seem to remember from statistics class that the standard deviation of a small sample size (less than 25) was meaningless. Am I wrong?
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