Vocabulary
An entire collection of people, animals, plants or objects from which data can be collected.
What is Population?
In order to determine snail populations, 340 snails were captured, tagged, and released. Later, 420 snails were captured. Of the 420 snails, 16 were already marked. What is the size of the snail population?
What is 8,925?
Identify the sampling design: Ms. Martinez puts all of her students' names in a hat and randomly selects one without looking.
What is Simple Random?
This sample consists of units of the population that are easily accessible.
What is convenience?
A perfect negative correlation has a correlation coefficient of ____.
What is -1?
A subset of individuals selected from a population, each of which had an equal probability of being chosen.
What is random sample?
150 marlin were captured, tagged, and returned to the deep ocean, where they live. Later, when 140 marlin were captured, 7 of the marlin had tags. What is the size of the marlin population?
What is 3,000?
Ciara wanted to know students' opinion on the new schedule at school. She survey's the first 30 students who come into her class.
What is Convenience?
Every possible group of units of the required size has the same chance of being the selected sample as any other sample of the same size.
What is Simple Random?
Describe the relationship between the variables. Weight vs annual income.
What is no correlation?
A systematic distortion of a statistic as a result of the sampling process.
What is bias?
In order to determine the population of gypsy moths in a forest, 200 were trapped, marked, and released. The next night, more moths were collected. Of the 150 that were collected, 15 were already marked. What is the size of the population of gypsy moths in the forest?
What is 2,000?
Identify the sampling design: School admin conducted a survey on post-graduation plans. Students of senior class 2021 were listed in order by class rank. The school selected a random number between 1 and 15, obtaining a number 11. Then, they selected every 11th student for the survey.
What is systematic ?
Units of the population are ordered in some fashion. Usually, every nth unit is chosen.
What is Systematic ?
Is it Correlation or Causation?
The number of cold, snowy days and the amount of hot chocolate sold at a ski resort.
What is Correlation?
The number of units included in a sample of a population.
What is Sample Size?
A pest control technician captures and applies ear tags to 23 brown rats, which he then releases. A week later
he traps 29 brown rats, 11 of which have ear tags. What is the estimate of the total population of brown rats?
What is 61?
Identify the sampling design: The CHS registrar wants to investigate the attitudes of their graduates. The registrar randomly selects 100 names from each of the four past graduating classes.
What is Stratified?
Units of the population are grouped; one or more groups are selected at random. All units of that group are included in the sample.
What is Cluster?
Data is analyzed comparing hours studied and grades. It is determined that the correlation coefficient is 0.92. What does this mean?
What is a strong positive correlation between studying and grades?
The extent of which data points differ from each other or from the rest of the data.
What is Variability?
On Wednesday, Ronan catches 660 honey bees from the beehive. He marks the honey bees and then releases them. On Thursday, Ronan catches 400 honey bees and notes how many were marked. Ronan then calculates his estimate as 22,000 honey bees in the beehive. How many of the 400 honey bees caught on Thursday were marked?
What is 12?
An independent research company wants to go door to door to survey people in the city of Fontana. The company decides to number all blocks within the city limit, randomly choose 1 block and survey all households on that block.
This is an example of:
What is Cluster?
This sample is selected by dividing the population into subgroups and then taking a fixed number of units from each group using the simple random sample.
What is Stratified ?
Which is true about "Positive Correlation" ?
What is one variable increases, the other also increases.