Determine which of the four levels of measurement is most appropriate.
-Ornithologists classify hummingbirds in the United States using 17 different species: Allen, Anna, Berylline, Black-chinned, Blue-throated, Broad-billed, Broad- tailed, Buff-bellied, Calliope, Costa, Lucifer, Magnificent, Ruby-throated, Rufous, Violet-crowned, White-eared, and Xantus. What type of data is collected?

The following questions relate to random samples and simple random samples.
-To monitor levels of the giardia parasite in the Rio Grande, aquatic biologists collect test tube samples at various locations determined by a computer randomization program. Does this sampling plan result in a random sample? Simple random sample?

Determine whether the given value is a statistic or a parameter.
-A sample of Sidewinder, or Horned, Rattlesnakes is found to have an average (mean) length of 26 inches.