On January 1, year 1, Roark Corp. purchased equipment for $120,000. The equipment has a residual value of $20,000, and has a life of 1,000,000 hours. Roark uses the units-of-production method of depreciation. In year 1, Roark used the machine 30,000 hours, and in year 2, Roark used the machine 50,000 hours. What is the depreciation expense for year 2

Find the expected net profit of an insurance company on a health-insurance policy if: the probability of a $5000 claim is 20%; the probability of a $1000 claim is 60%; the probability of a $20,000 claim is 10%, and the probability of no claim is 10%. the company charges $4000 for this coverage. interpret your answer.

Find the interest rate for a $4000 deposit accumulating to $5234.58, compounded quarterly for 9 years

Reliability and validity reliability and validity are two important considerations that must be made with any type of data collection. reliability refers to the ability to consistently produce a given result. in the context of psychological research, this would mean that any instruments or tools used to collect data do so in consistent, reproducible ways. unfortunately, being consistent in measurement does not necessarily mean that you have measured something correctly. to illustrate this concept, consider a kitchen scale that would be used to measure the weight of cereal that you eat in the morning. if the scale is not properly calibrated, it may consistently under- or overestimate the amount of cereal that’s being measured. while the scale is highly reliable in producing consistent results (e. g., the same amount of cereal poured onto the scale produces the same reading each time), those results are incorrect. this is where validity comes into play. validity refers to the extent to which a given instrument or tool accurately measures what it’s supposed to measure. while any valid measure is by necessity reliable, the reverse is not necessarily true. researchers strive to use instruments that are both highly reliable and valid.