Intro to Statistics
If 2 of the 8 teachers at ALPS are randomly selected to complete a survey about student preparedness for 11th grade, the 2 selected teachers represent this; a subset of the population.
Sample
The statistical term for a table containing information about the probability of each value within a set of data.
probability distribution
What is the probability of having 1 when you roll a die once?
1/6
Because you cannot stop 4.5 cars at a random traffic stop, the number of cars that are stopped is an example of this type of data.
discrete
This is the symbol used to represent a population mean
mu
Statistics is the science of Collection, ____, analyzing, presentation, and interpreting data in order to make decisions.
organizing
How do you compute the mean of a set of data?
add up all the numbers, then divide by how many numbers there are
If a sample space contains all the numbers from 1 to 100 and set A contains the even numbers between 1 and 100 then a set that contains all the odd numbers between 1 and 100 is called this in relation to A
compliment of A
Data that takes on a nice bell shape when graphed is called this
normal curve
This is the symbol used to represent the sample standard deviation
"s"
A person's favorite color is an example of this type of data.
Qualitative
A value that tells you how spread our the data is from the average.
standard deviation
a kind of categorical data with a set order or scale to it
ordinal
For perfectly normal data, these three things are equal.
mean, median and mode
When typed into the calculator this calculates the number of ways 3 students in a class of 10 can be assigned jobs as homework checker, paper distributor, and proctor.
10 P 3
The four ways in which data can be collected include an observational study, a simulation, and what other two methods?
experiment and survey
the statistical term for a bar chart
Histogram
there can be no negative numerical value
ratio
efers to a distortion or asymmetry that deviates from the symmetrical bell curve
skewness
In the example 5! = 5 * 4 * 3 * 2 * 1, the symbol ! is called this
factorial
a type of non-experimental research method in which a researcher measures two variables, understands and assesses the statistical relationship between them with no influence from any extraneous variable
Correlational research
is a discrete probability distribution that describes the probability of successes (random draws for which the object drawn has a specified feature) in draws, without replacement, from a finite population of size
hypergeometric distribution
Picking two random students to help Mr. Diver unpack snacks from his car is different from picking two students one of whom will go to Mr. Divers's car and the other will go have coffee in the teacher's lounge. For the former, you would use this type of calculation to determine the number of possible ways two students can be chosen.
Combination
refers to the distribution type where the more values are plotted on the right side of the graph
Negatively skewed distribution
This is the distribution used to calculate the probability that a police officer will be out sick 8 days this year given that on average an officer is our 3 days per year.
Poisson