Homework Answers
Sol
Given
n = 20
Mean = 654.16
S.D ( s ) = 164.43
95% Confidence interval
Alpha = 1 - 0.95
Alpha = 0.05
Alpha / 2 = 0.05/2
Alpha /2 = 0.025
95% confidence interval
C.I = MEAN +/- Z ( 0.025 ) * S / ✓N
OPTION B IS CORRECT
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1.3.(4 points) A commercial kitchen is generally defined in British Standard (BS 6173) as a catering area that prepares meals for the public-in contrast to a primarily domestic setting such as a Bed & Breakfast. CO2 gas is a reliable indicator of the effectiveness of kitchen ventilation. IGEM/UP/19 states that for newly designed kitchens, the CO2 level in staff working areas should be less than 2,800 parts per million (ppm) and that the kitchen appliances - or their gas supplies-should...
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