Correlation
The sum of the residuals
What is 0
Two or more events that do not effect each other
What is independent
A boy wants to know about how much of all of his grade level plays board games. He surveyed 35 kids in his grade level. Describe the population
what is all of the kids in his grade level at his school
The LSRL equation for flights from Buffalo (x) and air fare (y) is air fare = 101.24 + .0298 (distance in miles)
define 101.24 in context
101.24 is the y intercept. A flight that travels 0 miles would cost $101.24
The degrees of freedom in the following table observed expected total
monday 109 210 319
tuesday 110 220 330
wednesday 100 78 178
what is 2
The formula for finding a residual
What is observed - predicted
A cup has sticks numbered 1 through 13. What is the probability of an odd number?
what is 7/13
A person is surveying how many people go to the store. Every 10th person is surveyed. What type of sampling method is this?
what is systematic
The LSRL equation for flights from Buffalo (x) and air fare (y) is air fare = 101.24 + .0298 (distance in miles)
define .0298 in context
.0298 is the slope. For every mile traveled you can expect an increase of $.0298 in cost
coke pepsi total
male 19 6 25
female 10 15 25
total 29 21 25
The expected count of females that like pepsi
what is 10.5
Describe a regression that has a correlation coefficient of -0.9
What is strong negative linear
A bag contains 4 red, 2 green, 3 yellow, and one orange marble. What is the probability that a green then a red will be picked with replacement?
what is 8/100
The principal asked the first ten students who entered school if they liked school. What is the population, sample, and possible bias?
what is all students at the school, the first ten students that entered, response bias
Given the linear equation: Predicted sales = 5,424 + 391 Number of sales people working. If 3 people are working, what would be expected sales?
6597
If the χ2 critical value = 5.99 and the
χ2 calculated value = 6.65 do you accept or reject the Ho hypothesis?
reject
How do you find the percentage of variation in the response variable that is explained by the explanatory variable
what is r squared
A switch has a .99 probability of working correctly. What is the probability of at least one out of 5 switches do not work correctly?
what is .05
You survey every kid who goes into Chucky Cheese?What type of sampling is this>
census
Given the linear regression of Height (y) versus show size (x) and regression equation Predicted Height = 25 + 3.9 show size, Is the y intercept meaningful?
no. explain
The shape of the Chi-Square distribution is
what is right skewed
The standard deviation of a residual measures
What is the typical size of a residual
male female
yes 7 4
no 5 10
Using this table, what is P(yes | male)?
what is 7/12
What is a simple random sample?
what is every group of individuals has an equal chance of being represented.
The correlation between a cereal's fiber and potassium is .903. What percent of the variability in potassium is accounted for by the fiber?
What is 81.5%
The values of the expected should be ____ or more in at least 80% of the cells, and no cell should have an expected of less than ___
what is 5 and 1