Asked by: Jose Waxinasked in category: General Last Updated: 21st January, 2020
How do you find the p value for a left tailed test?
Then, how do I find the p value?
If your test statistic is positive, first find the probability that Z is greater than your test statistic (look up your test statistic on the Z-table, find its corresponding probability, and subtract it from one). Then double this result to get the p-value.
Additionally, why do we reject the null hypothesis when the p value is small? A crucial step in null hypothesis testing is finding the likelihood of the sample result if the null hypothesis were true. This probability is called the p value . A low p value means that the sample result would be unlikely if the null hypothesis were true and leads to the rejection of the null hypothesis.
Considering this, what does the P value mean?
In statistics, the p-value is the probability of obtaining the observed results of a test, assuming that the null hypothesis is correct. A smaller p-value means that there is stronger evidence in favor of the alternative hypothesis.
How do you find P value on calculator?
The p-value would be P(z <-2.01) or the area under the standard normal curve to the left of z = -2.01. Notice that the p-value is . 0222. We can find this value using the Normalcdf feature of the calculator found by pressing [2nd] [VARS] as noted above.