Consider the large bank that wants to estimate the average amount of money owed by its delinquent debtors, μ. The bank randomly samples n = 100 of its delinquent accounts and finds that the sample mean amount owed is x̄ = $230. Also, suppose it is known that the standard deviation of the amount owed for all delinquent accounts is σ = $90. Use the interval estimator x̄ ± 1.96σ_x̄ to calculate a confidence interval for the target parameter, μ.