4. errors in experiments explain what is wrong with each of these experimental designs. a. a farmer wanted to know if xyz fertilizer would be good for growing vegetables in his garden. he fertilized all his 100 bean plants with xyz but didn’t put any fertilizer on his 100 pepper plants. his beans didn’t do well at all, but he got a good crop of peppers. he concluded that xyz fertilizer was no good. • what was the research question? • what was the variable? • what was/were the error(s) in the farmer’s experiment? (choose one or more common errors from the following list.) o not enough subjects o subjects were not similar o conditions were not kept the same o the experiment was not reproduced b. alice larsen wanted to see if a new premium gasoline would give her more miles to the gallon. she filled her car with the new gas and went on a long trip. when she figured out her mileage, she discovered that she had gone 20 miles farther on this tank of gas than she had gone on a tank of regular gas when she was driving around town as usual. she decided to buy the premium gas from then on to get better gas mileage. • what was the research question? • what was the variable? • what was/were the error(s) in alice’s experimental design? (choose one or more common errors from the following list.) o not enough subjects o subjects were not similar o conditions were not kept the same o the experiment was not reproduced c. a molding machine in a factory was not working very well. about a third of the time, the plastic squirt guns that it was making came out with a flaw on the handle. the repair mechanic adjusted the stamping pressure. then she ran one gun through. it came out just fine, so she figured she had solved the problem. • what was/were the error(s) in the conclusion of the repair mechanic? (choose one or more common errors from the following list.) o not enough subjects o subjects were not similar o conditions were not kept the same o the experiment was not reproduced