Vocabulary
Correlations + Probabilities
Z-Score
Measuring Data
Misc.
100
A professor wants to know how college students feel about dorm food. She obtains a list of the 3500 undergraduates at her college and mails questions to 300 students selected at random. Only 98 questionnaires are returned. What is the population and sample?
Population: all college students
Sample: 98 that returned the survey
100
You have 20 shapes consisting of circles, squares, and triangles. There are 10 circles and 2 squares, in addition, the triangles are numbered. What is the probability of picking a triangle numbered 5?
What is 0.05
100
The mean of a data set is 6.5, you know that the middle 95% of the data is between 5.8 and 7.2. What is the standard deviation?
0.35
100
The Five Number Summary includes
What are Min, Q1, Median, Q3, Max
100
Your Encore leader's name (double points if you guess what it's short for)
Roni (short for Veronica)
200
You’d like to know about the relationship between hair color and age so you take a sample and note how old they are and what their natural hair color is. What is the quantitative variable and what is the categorical variable?
Quantitative: age
Categorical: hair color
200
If you have a coin. If you flip the coin 3 times, what is the probability of flipping 2 heads and 1 tail?
3/8=0.375
200
Z-scores=-1.02 and 0.98, find the proportion between
0.6826
200
What Percentage of the data falls between the first quartile and the maximum?
75%
200
The 5 members of One Direction
Who are Zayn, Louis, Niall, Liam, Harry
300
A nutritionist wants to know the eating habits of today’s middle school-aged students. She gathered a SRS of 10 students from every middle school in the US. She then asked them to provide a written account of every fruit they’ve eaten everyday for the past 2 weeks.
What is the design (observational or experimental), type of sample, and a possible bias
Observational, stratified, response
300
You roll 1 die twice, what is the probability of rolling a 3 and then a 6?
1/36=0.028
300
The scores of adults on an IQ test are approximately Normal with a mean of 100 and a standard deviation of 15. Joe scores 90 on such a test. His z-score is about _______. The percentage of people who score higher than Joe is _______.
-0.67, 75%
300
Identify any outliers in the following set of data
6, 8, 19, 10, 31, 16, 13, 12, 9, 14
31 is an outlier
300
A group of crows is called
What is a murder
400
Draw the sample space for a coin flipped 3 times
400
WHAT'S WRONG WITH THIS?
You are running a correlation and find that r= 1.2, you conclude that there is a STONG POSITIVE correlation, but cannot conclude that one causes the other
-1<r>1, so r cannot equal 1.2
400
You have a value of 65.4 and you know the standard deviation is 11.2. If you know that 45% of the values are higher than yours, what is the mean?
63.94
400
State the mean, median, and standard deviation for the following data
1, 57, 40, 22, 10, 42, 60, 37, 29, 19, 47, 53, 32, 20
Mean= 33.5
Median= 34.5
Standard deviation= 17.76
400
What was the world's first civilization?
Mesopotamia
500
_______ variables measure an outcome of a study
Response
500
There are 18 girls and 12 boys in a class, (2/9) of the girls and (1/4) of the boys walk to school. One of the students who walk to school is chosen at random. Find the probability that the student is a boy.
3/7= 0.429
500
If you know you are in the 90th percentile and you know that the mean of people who took a test is 85 with a standard deviation of 4.5. What was your score on this test?
90.76%
500
What measure of central tendency (mean, median, mode) is influenced by outliers?
Mean
500
What was the first soft drink in space?
Coca Cola