Question 1

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?

Accepted Answer

The answer of The following questions relate to random samples...

Question 2

Determine the type of sampling used: systematic, convenience, stratified, or
cluster.
-To obtain a sample of diabetics, a graduate student contacts nearby hospitals for a list of names.

Accepted Answer

The answer of Determine the type of sampling used: systematic,...

Question 3

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?
A) Nominal
B) Ordinal
C) Interval
D) Ratio

Accepted Answer

The weight of pregnant women is measured on a ratio scale because it has a true zero point and allows for the comparison of absolute magnitudes.

Question 4

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?
A) Nominal
B) Ordinal
C) Interval
D) Ratio

Accepted Answer

The air temperature is measured on an interval scale because it has meaningful differences between values, but no true zero point.

Question 5

Determine whether the given description corresponds to an observational study or
an experiment.
-Patients with severe heart failure were randomly assigned to two treatment groups to compare death and hospitalization rates. One group was treated with drug therapy while the other group was treated with a combination of drugs and an electrical device.

Accepted Answer

The answer of Determine whether the given description corresponds to...

Question 6

Determine which of the four levels of measurement is most appropriate.
-Scientists classify the four major deserts in North America using different regions: the Great Basin, the Mojave, the Sonoran, and the Chihuahuan. What type of data is collected?
A) Nominal
B) Ordinal
C) Interval
D) Ratio

Accepted Answer

The classification of deserts into categories like the Great Basin, Mojave, Sonoran, and Chihuahuan is a nominal level of measurement because it involves naming or labeling distinct categories without any inherent order or ranking.

Question 7

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.

Accepted Answer

The answer of Determine whether the given values are from...

Question 8

Identify the type of observational study: cross-sectional, retrospective, or
prospective.
-Geneticists studying the biodiversity of roses collect data from reports classifying the number of varieties during the past 30 years.

Accepted Answer

The answer of Identify the type of observational study: cross-sectional,...

Question 9

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".

Accepted Answer

The answer of Determine whether the given values are from...

Question 10

Determine the type of sampling used: systematic, convenience, stratified, or
cluster.
-Biologists studying the pH level of state waterways obtain a sample of streams from a randomly generated list by selecting every 5th stream on the list.

Accepted Answer

The answer of Determine the type of sampling used: systematic,...

Question 11

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.

Accepted Answer

The answer of Identify the type of observational study: cross-sectional,...

Question 12

The following questions relate to random samples and simple random samples.
-To assess the variation in volume (in cubic centimeters) of different manufacturer's pre-filled hormone injections, reproductive biologists select every 50th syringe beginning at a random moment. Does this sampling plan result in a random sample? Simple random sample?

Accepted Answer

The answer of The following questions relate to random samples...

Question 13

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.

Accepted Answer

The answer of Determine the type of sampling used: systematic,...

Question 14

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.

Accepted Answer

The answer of Determine whether the given description corresponds to...

Question 15

Determine which of the four levels of measurement is most appropriate.
-Physicians rank the severity of asthma using mild intermittent asthma, mild persistent asthma, moderate persistent asthma, severe persistent asthma, or brittle asthma. What type of data is collected?
A) Nominal
B) Ordinal
C) Interval
D) Ratio

Accepted Answer

The data is ordinal because the severity of asthma is ranked in a specific order, but the differences between the ranks are not measurable.

Question 16

Determine the type of sampling used: systematic, convenience, stratified, or
cluster.
-To conduct a survey of the interest of U.S. citizens in Yellowstone National Park, a list of zipcodes is compiled. All citizens in 50 different zipcodes are selected to be mailed a survey.

Accepted Answer

The answer of Determine the type of sampling used: systematic,...

Quiz 1: Introduction to Statistics

Determine the type of sampling used: systematic, convenience, stratified, or cluster. -To obtain a sample of diabetics, a graduate student contacts nearby hospitals for a list of names.

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 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 which of the four levels of measurement is most appropriate. -Scientists classify the four major deserts in North America using different regions: the Great Basin, the Mojave, the Sonoran, and the Chihuahuan. 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.

Identify the type of observational study: cross-sectional, retrospective, or prospective. -Geneticists studying the biodiversity of roses collect data from reports classifying the number of varieties during the past 30 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 the type of sampling used: systematic, convenience, stratified, or cluster. -Biologists studying the pH level of state waterways obtain a sample of streams from a randomly generated list by selecting every 5th stream on the list.

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 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.

Determine which of the four levels of measurement is most appropriate. -Physicians rank the severity of asthma using mild intermittent asthma, mild persistent asthma, moderate persistent asthma, severe persistent asthma, or brittle asthma. What type of data is collected?

Determine the type of sampling used: systematic, convenience, stratified, or cluster. -To conduct a survey of the interest of U.S. citizens in Yellowstone National Park, a list of zipcodes is compiled. All citizens in 50 different zipcodes are selected to be mailed a survey.