Fill in the blank. the is the probability of getting a test statistic at least as extreme as the one representing the sample data, assuming that the null hypothesis is true.
a. p-value
b. critical value
c. level of significance
d. sample proportion

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)