Probability
If alphabet tiles are placed in a bag and students each pull out one tile at random. What is the probability that a vowel is selected?
5/26
What is statistics? What is it used for?
Collecting, organizing, analyzing, and interpreting data in order to make decisions
is Occupation categorical or numerical?
Catagorical
In how many ways can you choose 4 out of 12 friends to invite to a dinner party?
495
Suppose a bag contains 12 green cubes, 5 blue cubes, and 3 yellow cubes. What is the random probability of choosing a cube that is not blue?
15/20
When rolling a number cube, the theoretical probability of not rolling a 6.
What is mean? How do you find it?
Mean is the average of all data points
You find it by adding all of the data points together and dividing the total number of data points.
Is data at the nominal level of measurement quantitative or qualitative?
Qualitative
How many ways are there to arrange 5 vases on a shelf that can fit 3 vases?
60
A traffic signal is green for 20 seconds, then yellow for 5 seconds, then red for 30 seconds. When you reach the signal, what is the probability it is yellow?
5/55
What is the probability of a fair coin landing heads on the tenth time it is flipped?
50%
the probability of flipping a coin landing heads will never change no matter how many times it is flipped.
What are histograms used for?
they are used to summarize discrete or continuous data that is measured on an interval scale.
salary, prices of food, and bills are all examples of ___ data
Numerical
what kind of probability is flipping a coin 6 times and getting 5 heads and 1 tails?
Experimental probability
A person has 5 pairs of pants, 12 shirts, and 3 pairs of shoes. How many different combinations are there?
180
Something that is guaranteed to happen has a probability of...?
1
What is the difference between population and sample?
The population is the entire group, the sample is a subset of the group.
Are all ordinal measurements also nominal? True or False
True
what is the measure of how likely an event will occur is?
Probability
A person is flipping a coin, spinning a spinner that is numbered 1-10, and selecting a card from a deck. How many possible outcomes are there?
1040
What is the probability of rolling an even number on a cube?
1/2
find the mode: 6, 12, 3, 15, 3, 9, 2, 8, 1
3
does a parameter ever change for a set population?
No
How many ways can a 4-person subcommittee be selected from a committee of 15 people?
1365
A baseball player can get a single, double, triple, HR, walk, or an out when he is up. Assuming the probability of each happening is the same, how many possible outcomes are there for the first 4 batters of the game?
1296