Scatterplot
X-variable is also known as
As x increases y increases
What is positive direction?
The bias when individuals inaccurately report their own traits
What is self-reported bias?
When two events cannot simultaneously occur at the same time
What is mutually exclusive events?
Where did Ms. Chung graduate for undergrad?
What is Emory University?
The equation for the line of best fit is
pH=5.43-0.0053(weeks)
The pH at the end of the study (150 weeks) is
What is 4.635?
A perfect, positively correlated data with linear regression will have a correlation coefficient of..
What is r=1?
Samuel tested every 20th Coca Cola bottle from the assembly line to make sure there were enough sugar in each bottle. He found that 15% did not have enough sugar. The sampling method is...
What is systematic sampling method?
Given that the events are mutually exclusive, P(A) = 0.4, P(B) = 0.3,
P(A and B) =
What is P(A and B) = 0?
Countries in which Ms. Chung has lived is
What is Korea, Belgium, and United States?
The 4 aspects when describing correlations is
What is form, direction, strength, and outliers
They reported that the regression line is pH=5.43-0.0053(weeks).
The pH was found to be 4.9. The estimate number of weeks is...
What is 100 weeks?
The surveyors ask a political poll on Twitter to determine how many people will vote for an upcoming candidate. The bias is...
P(A or B) = ?
What is the most common element in the air?
A) Oxygen
B) Carbon
C) Nitrogen
D) Hydrogen
What is C) Nitrogen?
Describe the correlation coefficient of r=-0.57 with no outliers
What is linear, negative, weak, no outliers?
The linear regression line is y = 4.7x + 51. The actual y-value at when x=5 is 90.
The residual is...
What is 15.5?
The difference between cluster random sample and stratified random sample is...
What is cluster random sample is grouping individuals and sampling everyone in one group, while stratified random sample is grouping individuals by a similar characteristic and selecting one from each group?
P(A) = 0.5
P(B) = 0.4
P(A and B) = 0.1
P(A or B) = ?
What is P(A or B) = 0.8?
The 14th amendment states
What is no state shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States?
The four required components when drawing a scatterplot is
What is two labels, consistent scale, and correct data?
Students wanted to determine whether test scores or homework grades are a better indicator in predicting GPA. Students found the correlation with test scores to be r=0.68 and the correlation with homework grades to be r=0.89.
Which indicator is better at predicting GPA? Why?
What is the homework grades because they have a higher correlation coefficient value.
Researchers wanted to determine if caffeine had an effect on adult energy levels in the morning. The researchers randomly assigned 50 adults to take a caffeine pill every morning, and another 50 adults to take a placebo pill every morning. After a month, the researchers recorded there was no difference in energy level between both groups.
Explain how researchers can randomly assign 50 adults.
What is 1. Assign each adult a number from 1-50
2. Use a random number generator to select adults randomly and place them in each treatment group?
P(A)= 0.6
P(B) = 0.3
P(A or B) = 0.7
P(A and B) =
What is P(A and B) = 0.2?
The official language of Belgium is...