## Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

a. State the hypotheses and identify the claim. $H_o: \mu=1229$ $H_a: \mu\ne1229$ (claim, two tailed test) b. Find the critical value(s). $\alpha=0.05, |z_c|=1.645$ c. Compute the test value. $z=\frac{1350-1229}{250/\sqrt {15}}=1.87$ d. Make the decision. Since $z\gt z_c$ we have enough evidence to reject the null hypothesis and support the claim. e. Summarize the results At $\alpha = 0.05$, we can conclude that the monthly rent outside San Francisco differs from that in the city.