Decide whether the normal approximation is appropriate by checking the rule of thumb. stion 0.15 0.10 250 260 270 280 X bingenial with n=300, p=0.90 Visually, the histogram appears to be normal. Now check to see if np 2 10 and nq 2 10. np = and nq Do our guidelines indicate that the normal approximation is appropriate for this binomial random variable? Check