For the given claim, complete parts (a) and (b) below. claim: high school teachers have incomes with a standard deviation that is more than $23.000. a recent study of 128 high school teacher incomes showed a standard deviation of $26.000.

Moody corporation uses a job-order costing system with a plantwide predetermined overhead rate based on machine-hours. at the beginning of the year, the company made the following estimates: machine-hours required to support estimated production 100,000 fixed manufacturing overhead cost $ 650,000 variable manufacturing overhead cost per machine-hour $ 3.00 required: 1. compute the plantwide predetermined overhead rate. 2. during the year, job 400 was started and completed. the following information was available with respect to this job: direct materials $ 450 direct labor cost $ 210 machine-hours used 40