Suppose the time that it takes a certain large bank to approve a home loan is normally distributed with mean (in days) μ and standard deviation σ=1. the bank advertises that it approve loans in 5 days, on average, but measurements on a random sample of 500 loan applications to this bank gave a mean approval time of = 5.3 days. is this evidence that the mean time to approval is actually longer than advertised? to answer this, test the hypotheses h0: μ=5, ha: μ> 5 at significance level α=0.01. you conclude that: a. ha should be rejected. b. there is a 5% chance that the null hypothesis is true. c. h0 should be rejected. d. h0 should not be rejected.