A research article claims that the mean cost of raising a child from birth to age 2 in a rural area is $10,460. You believe this value is incorrect, so you select a random sample of 900 children and find the mean cost is $10,345 with a standard deviation of $1520. Is there enough evidence to conclude that the mean cost is different from $10,460 at 5% level of significance? a. Which of the following statistical tests is most appropriate in this scenario? O Two-Tailed Z-Test O One-Tailed Z-Test O Two-Tailed T-Test O One-Tailed T-Test b. What are the appropriate hypotheses for the test? O Họ : µ = $10460 H1 : 4 + $10460 O Ho : u+ $10460 H, : µ = $10460 O Ho : u = $10460 H, : µ > $10460 O Ho : u = $10460 H, : µ < $10460 C. After conducting the appropriate significance test, the test statistic was found to be -2.24. Therefore, the conclusion for the test is: O Reject Ho, because p-value is less than 0.05 O Fail to reject Ho, because -2.24 falls outside the critical region