I was trying to learn the usage of p-value in Multiple Regression Analysis. I have found the following sentence which meaning is not clear to me.
If the null hypothesis is true (b1=0), the chance of us getting a sample AS EXTREME AS we did.
I found another sentence like above.
The P value is the probability of seeing a result AS EXTREME AS the one you are getting (a t value as large as yours) in a collection of random data in which the variable had no effect.
I found this sentence in this link.
The meaning of AS EXTREME AS for this case is not clear to me at all. Since English is my second language, I cannot understand how the statements stated above explain the importance and usage of p-value.
I would be grateful if anyone would explain the above statements in such a way that a non-native speaker of English can easily understand the actual sense.