I. An ergonomics engineer wants to know whether smoking affects the ability of the heart to exert pressure which may then lead to eariier fatigue effects. To make the experiment. he designed two inclined planes. one at 15 degrees and another at a steep 30 degrees. where workers were to bring a 5 kilogram load up and down the incline. As a baseline. he also tested their blood pressure at at zero degree incline. Their blood pressure at the end of the exercise is then measured. The engineer had four representative workers. which he instructed to go through all three inclines (O. 15 and 30 degrees) carrying a ve-kilo load. Worker 1: Thin boy. 18 years old (non-smoker) Worker 2: Fat girl. 19 (non smoker) Worker 3: Thin woman. 33 (smoker) Worker 4: Fat man. 38 (smoker) The engineer proceeded with the experiment and the post exertion blood pressures of the workers (W1. W2, W3. W4) were assigned to the experimental trials as follows. Each worker had their blood pressure read once after their exertion on the corresponding incline. 1. How many replicates were taken for each treatment combination? 2. Consider this hypothetical scenario: If the experiment concluded that Non- smokers have lower blood pressure than smokers for any incline. what conclusions can you also derive about worker body weight? Non-smoker W1: W1: W1: W2: W2: W2: Smoker W3: W3: W3: --- Options for #2: 3.) There are no thin old man, nor thin young woman. nor two other types as subjects. We cannot therefore ascertain the interaction effect of body weight with gender. b.) Not enough information is available to make a valid statistical conclusion. c.) We would have confounding between smokerfnon smoker status and body weight. We cannot isolate body weight as a factor or not as carefully as we can with smoker status. (1.) Since both fat and thin people are represented In the both smoking types. we should expect no differences in blood pressures between fat and thin workers