4.4 np:>5 Pq=>5 2 points) Merta reports that 74% of its trains are on time. A check of 60 randomly selected trains shows that 38 of them arrived on time. Use the normal distribution to approximate the binomial distribution (a) Find the mean and standard deviation M= np n:60 J= Nnpq P: 0.74 9:p=26 M= 44.4 0=3.3976 (b) Find the probability that among the 60 trains, 38 or few arrive on time. Round to four decimals. Draw the normal curve with appropriate shading. P(x≥38) M=44.9