In a scientific trial, some participants are given a pill that contains no active ingredient but looks identical to a pill that contains the active ingredient being studied in the trial. Which of these terms describes this pill?

Which of the following is usually employed before the others by an investigator using the scientific method?

In the laboratory, you see a fuzzy growth on some of the gels in your incubator. What is the name given to this step of the scientific method?

A “controlled” experiment occurs when:

Dr. Ima Gene is trying to develop a drug that will reverse deafness in a breed of dog, the Dalmatian. Many members of this breed have a genetic problem that will cause them to go deaf by the age of one. Dr. Gene is developing a study in which she has found 30 Dalmatians that are about one-year-old and have recently gone deaf. She will give 15 of the dogs the newly developed drug and 15 of them will receive a sugar pill. Which group will serve as the control group for the experiment?

Dr. Ima Gene is trying to develop a drug that will reverse deafness in a breed of dog, the Dalmatian. Many members of this breed have a genetic problem that will cause them to go deaf by the age of one. Dr. Gene is developing a study in which she has found 30 Dalmatians that are about one-year-old and have recently gone deaf. She will give 15 of the dogs the newly developed drug and 15 of them will receive a sugar pill. Dr. Gene has an assistant that helps her care for the dogs. He takes a special liking to the dogs that are given the drug. He feeds them special food and takes them for long walks. How would this impact the experiment?

Dr. Ima Gene is trying to develop a drug that will reverse deafness in a breed of dog, the Dalmatian. Many members of this breed have a genetic problem that will cause them to go deaf by the age of one. Dr. Gene is developing a study in which she has found 30 Dalmatians that are about one-year-old and have recently gone deaf. She will give 15 of the dogs the newly developed drug and 15 of them will receive a sugar pill. Dr. Gene finds that after several weeks on the drug, the dogs improve their hearing. Dr. Gene then finds out about the special attention that those dogs were given by her assistant. She decides she needs to repeat her experiment but can only locate 2 dogs in her area that meet her requirements. Why should she wait until she can locate more dogs?

In order for a hypothesis to be valid, it must be testable.

Explain the difference between mean and mode

Characteristics of an experimental system that are subject to change are called __________.