This is the most dangerous and most easy sampling. Some examples would be an online poll, survey your best friends or asking for a volunteer at the mall
100
What is Experiment
A study in which we apply some "treatment" and then proceed to observe its effects on the subjects of the experiment
100
What are Class Boundaries
Numbers used to separate classes; these numbers are the midpoints of the intervals from consecutive upper to lower class limits; should not be data values
100
Tells how many standard deviations above or below the mean a particular value is
What is a Z-score
200
Rearrange the following numbers to fine the median;
6,3,9,6,1,3,7
6
200
What is Stratified Sampling
A sample of university students was collected. The researcher organized the population by college class and then selected the appropriate numbers of freshmen, sophomores, juniors and seniors.
200
What is Prospective
In this type of observational study, data are collected in the future from groups called cohorts
200
What are class midpoints
This is found by adding the upper and lower values of each class and then dividing by 2
200
On a TRUE/FALSE question, what is the probability that the answer will be TRUE?
1/2
300
If I was looking for the number that occurred most, I would be looking for what? Mean, Median, or Mode?
Mode
300
What is Systematic Sampling
Randomly choose a starting point and then select every kth subject in the population.
300
What is Retrospective
In this type of observational study, researchers studied the medical records of a sample of patients who had died of lymphoma. They identified which were smokers and which were not to determine if a correlation between smoking and lymphoma exists.
300
What is class width
Subtract the minimum value from the maximum values and divide by the number of classes
300
You are taking a multiple choice test, all with 4 possible answers. If you had no idea what the answer was, what is the probability of you guessing the incorrect answer?
3/4
400
To find the median, i need to arrange the numbers from _____ to _____ and find the ______ number.
Smallest, Greatest, Middle
400
What is Cluster Sampling
For the monthly financial audit, the auditor randomly selects 5 days out of the month and audits every transaction recorded for each of the 5 days
400
What is Cross-sectional
A study in which data are observed and collected at one point in time.
400
What is relative frequency %
This is found by taking the frequency and dividing it by the sum of all the frequencies where the results will by multiplied by 100
400
You are taking a multiple choice test, all with 4 possible answers. If you knew that two of the answers were incorrect, what is the probability that you will guess the right answer?
1/2
500
A student earned an 84 on her midterm exam. She earned a grade of 79 on the final exam and 85 on her class projects. Her homework grade was 87. The midterm counts for 40% of the course grade, the final exam counts for 30%, the project counts for 10%, and homework counts for 20%. The weighted mean course grade rounded to one decimal place.
What is 83.2
500
What is Simple Random Sample
A person researching educational levels within a company takes the full employee list and applies a random number algorithm to this in order to select 100 people to interview
500
What is Randomization
Assigns subjects to groups through a process of random selection
500
What is a normal distribution
The values in your frequency distribution start low and then they get to a maximum in the middle and then the values decrease to low again.
500
What is the probability of answering a multiple choice question correctly if you know that one of the answers is definitely wrong but you have to guess between the 3 remaining answers?