Descriptive and Inference Statistics
(Population, Sample, Data)
(Population, Sample, Data)
This type of statistics involves organizing, summarizing and presenting data.
Descriptive Statistics
The level of measurement that names categories without order.
Nominal
Qualitative or Categorical Data
A table that shows how often each data value occurs
Frequency Table
If you survey 50 students from your school, the 50 students represent the _____________.
Sample
Interval
"number of siblings" is an example of which type of data?
Quantitative Data
Selecting every 5th person on a list is an example of what method?
Systematic Sampling
How often eache values occurs.
This type of statistics makes generalizations about a population based on a sample.
Inferential Statistics
Ordinal
The number of goals scored in a soccer game: discrete or continous?
Discrete
Dividing a population into groups and then randomly selecting two entire groups.
In a frequency table, what is the cumulative frequency?
The running total of frequencies up to that point.
In a school the principal survey 50 students for the study habits.
Tell the sample and the population
Sample: 50 students
Population: Students of the school
The level of measurement with a true zero, allowing ratios to be calculated.
Ratio
Data can take any value in an interval
Continuous Data
Asking only your friends about their study habits, is an example of...?
Convenience Sampling
How you can find the relative frequency.
You divide the frequency over the total.
Which type of statistics uses probability to draw conclusions about populations?
Inferential Statistics
Put these variables in their correct level of measurement: temperature in Celcious, age, eye color, class rank
temperature in Celcious = Interval
age = Ratio
eye color = Nominal
class rank = Ordinal
Explain why weight is considered continuous data.
Because it take infinitely many values within an interval (55.2kg, 55.28kg, 55.284kg, etc...)
Dividing a population into subgroups (likes and dislikes, boys and girls...) and randomly selecting individuals from each subgroup.
Stratified Sampling
A frequency table can be used for both qualitative and quantitative data.
True