(17)When using normal approximation for distribution of for hypothesis testing,

one should always verify that is nearly normal under H₀ (meaning under the assumption that the null hypothesis (H₀) is true), this can be done by checking for the ________________and the ________________________________________

(18)If p_o represents the hypothesized population proportion, and if n is the number of trials, in order to use the normal approximation to the Binomial Distribution, both n*p_o and n*(1- p_o) are both ____________