what is the p value in this statement You know that the organization's normal average donation size is $\$15,500$, with a standard devation of 238. You try the new fundraising strategy on a group of 150 donors. The mean and standard deviation of the sample is $\$16,100$, with a standard deviation of 410. Write a function to do a one-sample t-test (do not use an in-built t-test function)