In which of the following circumstances would a researcher be most likely to choose a quasi-experimental research design? Group of answer choices

when there are more than three important confounding variables to control
when doing research in an applied or natural setting where control is difficult to impose
when controlling experimenter and participant expectation effects would involve an unacceptable level of deception
when it is difficult to recruit enough participants to make standard statistical testing valid

Determine the time of the day and month of the year at which the peak sensible cooling load occurs for a top floor, north-eastern corner room of an office building in durban for the following conditions: floor area: 8 x 8 x 3 m east and north walls: 115 mm face brick (outside), 20 mm air space, 115 mm ordinary brick (inside) with 15 mm plaster roof construction: suspended plasterboard ceiling, 450 mm air space, 150 mm concrete, 75mm screed, waterproofing no heat transfer across other surfaces window area 3x 1,5 m high in north wall only. ordinary glass with venetian blinds. lights and occupants : from 07: 00 to 18: 00 average light density: 25 w/m2 number of occupants : 5 seated, light office work room temperature 24°c