If the units of variable input in a production process are 1, 2, 3, 4, and 5, and the corresponding total outputs are 30, 34, 37, 39, and 40, respectively. The marginal product of the fourth unit is:

A. 2
B. 1
C. 37
D. 39

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.

If springfield is operating at full employment who is working a. everyone b. about 96% of the workforce c. the entire work force d. the robots

On july 7, you purchased 500 shares of wagoneer, inc. stock for $21 a share. on august 1, you sold 200 shares of this stock for $28 a share. you sold an additional 100 shares on august 17 at a price of $25 a share. the company declared a $0.95 per share dividend on august 4 to holders of record as of wednesday, august 15. this dividend is payable on september 1. how much dividend income will you receive on september 1 as a result of your ownership of wagoneer stock