Rejecting the H0
This phrase is used to describe an observed effect so large that it would rarely occur by chance.
What is statistically significant?
This type of random variable requires a fixed number of trials, each observation to be independent, and to have two outcomes ("success" or "failure").
What is a binomial random variable?
This calculator command can be used to find the area under a normal distribution and above an interval.
What is normalcdf?
The formula(s) to identify outliers for one variable data.
What is Q1 - 1.5(IQR) and Q3 + 1.5(IQR)?
The time you better be at school to take your exam!
What is 7:30 AM?
The type of significance test used for the mean of a single population when the standard deviation of the population is unknown.
What is a T test?
Events that have no outcomes in common and can never occur simultaneously, for which the addition rule is used.
What are disjoint events (or mutually exclusive events)?
This rule helps to determine if data is normally distributed by checking the number of observations within 1, 2, and 3 standard deviations away from the mean.
What is the Empirical Rule (68-95-99.7 Rule)?
This is when neither the subject nor those who measure the response variable know which treatment a subject received.
What is a double-blind experiment?
The number of multiple choice questions correct to pass AP Stats Exam (with a 3)!
What is 25 questions? (62.5%)
The three conditions needed for a z-test.
What are the random condition, 10% condition, and large counts condition?
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) = 1/216
This measure of center is more resistant to outliers than the mean.
What is the median?
The 3 basic principles of experimental design.
What are control, randomize, and replicate?
The amount of Free Response Questions on the AP Stats Exam.
What is 6?
The interpretation of the p-value of 0.001 given an alpha = 0.05.
What is "since the p-value is less than alpha = 0.05, we reject the null hypothesis, and conclude there is significant evidence to support the alternative hypothesis"?
The probability of pulling a red or a Queen from a standard deck of cards.
What is P(red or queen) = P(red) + P(queen) - P(red and queen) = 28/52
This is equal to the square of the standard deviation
What is the variance?
The type of bias when some groups in the population are left out of the process of choosing a sample.
What is undercoverage bias?
Good advice for the multiple choice section of the AP Statistics Exam
(multiple responses okay here)
What is....
- don't read the whole question first
- read the multiple choice answers first
- answer every question
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 true difference of means, mean #1 - mean #2, is between -4.25 and -1.33"?
The rule for finding the probability of a female given that they are an AP Stats student.
What is P(Female|AP Stats Student) = P(Female AP Stats Student)/P(AP Stats Student)?
To calculate, subtract the mean of the distribution from the observed x, then divide by the standard deviation.
What is the z-score (or standardized value)?
This type of sample is when the population is divided into groups that are physically close. Some groups are randomly selected and all individuals in the chosen groups are sampled.
What is cluster sampling?
A strategy for every free response question on the AP Statistics Exam.
What is include context in every answer?