Professor cook is conducting a research study on the cognitive abilities of infants and young children. rather than follow subjects from birth to the age of 10, he assesses small groups from various ages. of 1-year-olds he measures five children, of 2-year-olds he measures five different children, and so forth. by the time he has completed his study dr. cook has an assessment of 50 different children from 10 different age groups. which of the following describes the research method that dr. cook is using? a. a cross-sectional designb. a longitudinal designc. a quasi-experimental designd. a semi-reliable design

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Based on the supply and demand theory, why do medical doctors earn higher wages than child-care workers?

M. cotteleer electronics supplies microcomputer circuitry to a company that incorporates microprocessors into refrigerators and other home appliances. one of the components has an annual demand of 235 units, and this is constant throughout the year. carrying cost is estimated to be $1.25 per unit per year, and the ordering (setup) cost is $21 per order. a) to minimize cost, how many units should be ordered each time an order is placed? b) how many orders per year are needed with the optimal policy? c) what is the average inventory if costs are minimized? d) suppose that the ordering cost is not $21, and cotteleer has been ordering 125 units each time an order is placed. for this order policy (of q = 125) to be optimal, determine what the ordering cost would have to be.