Exam 1: Introduction to Statistics

Identify the type of observational study: cross-sectional, retrospective, or prospective. -Scientists studying the migration habits of Aleutian geese collect data from reports measuring the number of geese during "fly-offs" over the past 15 years. Determine the type of sampling used: systematic, convenience, stratified, or cluster.

Determine which of the four levels of measurement is most appropriate. -Biologists monitor the air temperature of the Biosphere 2 in Oracle, Arizona. What type of data is collected?

Determine whether the given value is a statistic or a parameter. -In studying the Loggerhead turtle on Anna Maria Island, FL, scientists observe the average (mean) number of hatchlings in all 253 nests.

The following questions relate to random samples and simple random samples. -To assess the variation in measurement (in cubic centimeters) of a pre-filled syringes containing experimental cervical cancer vaccine, manufacturers select every 200th syringe beginning at a random moment. Does this sampling plan result in a random sample? Simple random sample?

Determine which of the four levels of measurement is most appropriate. -Biologists measure the water temperature of the Merrimack River in New Hampshire. What type of data is collected?

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.

Determine the type of sampling used: systematic, convenience, stratified, or cluster. -To obtain a sample of pregnant women, a researcher contacts her son's preschool teacher for a list of names.

Identify the type of observational study: cross-sectional, retrospective, or prospective. -A researcher from the department of defense is studying the psychology of trauma. He plans to follow the children of service members who died in Afghanistan for the next 20 years.

Identify the type of observational study: cross-sectional, retrospective, or prospective. -Climatologists studying global warming record the average (mean) temperature of the Earth and the change in size of the ice caps during the next 50 years.

Determine which of the four levels of measurement is most appropriate. -The income range of attendees at a research conference is gathered as upper, middle, and low levels. What type of data is collected?

Determine which of the four levels of measurement is most appropriate. -Doctors measure the weights (in pounds) of pregnant women. What type of data is collected?

Determine the type of sampling used: systematic, convenience, stratified, or cluster. -Medical researchers following living organ donors classify donors according to whether they donated a kidney, a portion of the liver, a portion of the lung, bone marrow, or blood. The general health of 200 donors from each category is monitored for five years.

Determine whether the given values are from a discrete or a continuous data set. -The Produce for Better Health Foundation manages the campaign advocating consumers to eat "5 Fruits and Vegetables A Day for Better Health".

Determine whether the given values are from a discrete or a continuous data set. -The number of hatchlings from a sample of 45 bluebird nests is 135.

Determine the type of sampling used: systematic, convenience, stratified, or cluster. -Biologists divide the regions where Red foxes are found into the Nearctic, Palearctic, Oriental, Ethiopian, and the Australian region. They plan to follow 100 female foxes from each region to find the average (mean) number of their offspring.

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 which of the four levels of measurement is most appropriate. -Doctors measure the weights (in pounds) of preterm babies. What type of data is collected?

Determine whether the given values are from a discrete or a continuous data set. -A sample of male Bighorn sheep has an average (mean) horn base circumference of 43.2 centimeters.

Determine whether the given description corresponds to an observational study or an experiment. -In a study of the Bald Eagle population, the number of breeding pairs is counted.

The following questions relate to random samples and simple random samples. -To monitor the population of Herring in Manchester, New Hampshire, fisheries biologists catch samples of the fish in a river at various locations determined by a computer randomization program. Does this sampling plan result in a random sample? Simple random sample?