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
What is Convenience Sampling
100
A study in which we apply some "treatment" and then proceed to observe its effects on the subjects of the experiment
What is Experiment
100
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
What are Class Boundaries
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
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.
What is Stratified Sampling
200
In this type of observational study, data are collected in the future from groups called cohorts
What is Prospective
200
This is found by adding the upper and lower values of each class and then dividing by 2
What are class midpoints
200
a set of data values is the difference between the maximum and minimum value
What is the range
300
If I was looking for the number that occurred most, I would be looking for what? Mean, Median, or Mode?
Mode
300
Randomly choose a starting point and then select every kth subject in the population.
What is Systematic Sampling
300
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.
What is Retrospective
300
Subtract the minimum value from the maximum values and divide by the number of classes
What is class width
300
are measures of location. There are 99 denoted P1, P2, . . . P99, which divide a set of data into 100 groups with about 1% of the values in each group.
What are Percentiles
400
To find the median, i need to arrange the numbers from _____ to _____ and find the ______ number.
Smallest, Greatest, Middle
400
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
What is Cluster Sampling
400
A study in which data are observed and collected at one point in time.
What is Cross-sectional
400
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
What is relative frequency %
400
a set of values is a measure of variation equal to the square of the standard deviation.
Variance
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
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
What is Simple Random Sample
500
Assigns subjects to groups through a process of random selection
What is Randomization
500
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.
What is a normal distribution
500
The two types of Standard deviations and their formulas.
Sample Standard Deviation (formula) and Population Standard Deviation (formula)