Classify the experiments according to their experimental designs. Some designs m
ID: 3073111 • Letter: C
Question
Classify the experiments according to their experimental designs. Some designs may be used more than once. Studying. A sample of 30 students was separated into upperclassmen and lowerclassmen. The members of each group were randomly assigned student were recorded at the completion of the experiment. to two different studying techniques. The responses of each Reading. A sample of 50 students was grouped into pairs of similar individuals based on school performance and gender. Then, within these pairs, each student was assigned to a different reading program. After three weeks, the responses of each pair were analyzed to compare the effects of the reading programs. Jockeys. Twenty horses were assigned to run two laps, once with jockey A and once with jockey B. The order of treatments was randomized for each horse. The lap times of each horse were recorded to compare the effects of the two different treatments. Lakes and birds. A random sample of 100 lakes was selected in a particular state. To compare the diversity of birds among the lakes, the count and species identity of all birds were recorded for each lake over a 24-hour period. Swim routines. Eighteen swimmers were randomly assigned to three groups, and each group participated in a different swim routine. After the swimmers used the routines for one month, the effects of each routine were measured for various aspects of swimming.Explanation / Answer
Studying: block design
Reading: Matched pairs design
Jockeys: Matched pairs design
Lakes & birds: Observational study
Swim routines: Completely randomized design