AP Statistics Project

Sampling

100

Neither the subject nor those who measure the response variable know which treatment a subject received.

What is a double-blind experiment?

200

When some groups in the population are left out of the process of choosing a sample

What is undercoverage?

300

The population is divided into groups. Some groups are randomly selected and all individuals in the chosen groups are sampled.

What is cluster sampling?

400

Survey every nth person who walks by until you have 75 completed surveys

Systematic sampling

500

Randomly choosing a few people from every group.

Stratified random sample

Interpretations

100

A confidence interval of (.043, .124) with a C%=95%

What is "We are 95% confident that the true proportion of _ is between .043 and .124. units"?

200

A confidence interval of (40,73) with a confidence interval of 90%.

What is "We are 90% confident that the true population mean is between 40 and 73 units."

300

P-value = 0.001

What is "since the P-value is less than any reasonable significance level, we reject the null. We conclude that there is significant evidence to support the alternative hypothesis."

400

95% Confidence level for a poplulation proportion

What is What is "This interval was created using methods that capture the true proportion 95% of the time"?

500

The 95% confidence interval (-4.25, -1.33) for the difference of two means (mean #1 - mean #2).

What is "We are 95% confident that the average mean difference in mean #1 minus mean #2 is between 4.25 and 1.33 units less than mean #2"

Formulas to Remember

100

How to identify outliers for univariate data

What is Q1 - 1.5(IQR) and Q3 + 1.5(IQR)?

200

Expected count formula

What is "(Row Total)(Column Total)/(Grand Total)

300

How to determine if two events, A and B, are independent

What is P(B|A) = P(B) or P(A and B) = P(A)P(B)?

400

Probability and Distribution mean formula for the binomial distribution

Sample mean= sample size(probability of success)

500

Probability and Distribution mean formula for the geometric distribution

What is "the sample mean=1/probability of success"

Probability Rules

100

The rule for the probability of pulling a red or a Jack from a standard deck of cards.

What is P(red or Jack) = P(red) + P(Jack) - P(red and Jack)?

200

The rule for finding the probability of a male given that they are an AP Stats student.

What is P(Male|AP Stats Student) = P(Male AP Stats Student)/P(AP Stats Student)

300

The rule for finding the probability of rolling a fair die three times and getting three fours.

What is P(rolling three 4s) = P(4)*P(4)*P(4) = P(4)^3?

400

P(A) * P(B|A)

What is P(A and B)

500

The rule for finding 10 successes in 15 trials.

What is P(X=10) = (15 C 10)*p^10*(1-p)^5

Calc Controls

100

How to get to one vars stats?

What is "stat->calc->1: 1-Var Stats"

200

How to get to normalcdf?

What is "2nd^Vars->1: normalcdf("

300

How to get to ZInterval?

What is "Stat->Tests->7: ZInterval"

400

How to get to Goodness of Fit test?

What is "Stat->Tests->C: x² GOF-Test"

500

How to get to geometcdf?

What is "2nd^Vars->G: geometcdf("