Vocabulary Words
What is a population
the whole or entire group
What percentage makes up the first standard deviation
What kind of sample is the best sample to have
random
This type of research has a controlled group or variable
Experimental
The the Z score is a negative does that mean it is above the mean or below the mean?
Below
A perfect bell curve creates what type of distribution
Normal
What percentage makes up the third set of standard deviation
97.5
If I take a survey of the 9th grade algebra class asking them if their favorite class is algebra what kind of sample is this?
Convivence
What is the difference between observational and survey research
Survey is a questionnaire or interview
Observation is where you watch and do not interact with the subjects
The average fish caught during the Alaskan fishing season is 1000 lbs of fish per trip with a standard deviation of 125. This year during the fishing season 1300 lbs of fish were caught per trip.
Find the Z score
2.4
What is a sample
a smaller part of the population
What is standard deviation of the following data points
[0, 1, 2, 6, 11]
4
If I list all the students at Meadowcreek in alphabetical order and pick every 10th student for my survey is this considered randon
yes
The researcher wants to know if people will pick up trash that is not their on the ground or walk past it. So they watch people for several hours to see if they will pick up the trash.
Observational
The average number of Pokemon cards in a deck is 56 with a standard deviation of 2. If James opens a pack of Pokemon cards with 56 cards in it what is the standard of deviation
Double Jeopardy
Explain the reasoning for the standard deviation
0
It is 0 because the average is 56 cards and he opened a deck that had 56 card in it.
What is bais
our personal beliefs or experiences or values
The standard deviation of one means it is how far away from the mean
1
Primary
A research company wants to know if parents will buy their children a new flavor of Kool-Aid. They send out 1000 samples of the new flavor along with a questionnaire and get 600 responses.
Survey
The average shopper sends $800.00 during the Christmas season. The standard deviation is 20. This year shoppers only spent $680.00.
Find the Z score
-6
What is a confounding variable
a variable that we do not plan for in research which causes bias
Find the standard deviation of the following data point
[ 2, 2, 5, 7, 8, 9, 11]
6.28
Looking over journal articles or data already collected for research is what kind of data
secondary
A research group is testing a new drug. One group gets the trial drug and the other group get a placebo.
Experimental
The average number of cookies Ms. Meyer makes in a batch is 18 with a standard deviation of 3. The last batch she made had 21 cookies in it.
Find the Z score
1