Sampling & Experiments
Interpretations
Important Things You May Have Forgotten
Probability Rules!
Calculator Commands
100
Neither the subject nor those who measure the reponse variable know which treatment a subject received.
What is a double-blind experiment?
100

Is there sufficient evidence to support the alternative Hypothesis?

P-value = 0.001

Significance Level = .05

What is "since the P-value is less than the significance level, we reject the null hypothesis, and conclude there is significance evidence to support the alternative hypothesis"?

100
How to identify outliers for univariate data
What is Q1 - 1.5(IQR) and Q3 + 1.5(IQR)?
100

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

What is .0046?

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

100
The correlation coefficient between L1 and L2
What is STAT-->CALC-->8:LinReg(a+bx) L1, L2?
200

A way to collect data on your population of interest by asking questions

What is a survey?

200
The slope in the least-square regression line, y = 15 - 4x
What is "For every one unit increase in the explanatory variable, there is on average a 4 unit decrease in the reponse variable"?
200

An acronym used to describe a distribution.

What is SOCS?

S: Shape

O: Outliers

C: Center

S:Spread



200

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

13 cards each suit, 52 total cards,

What is .538?

P(red or queen) = P(red) + P(queen) - P(red and queen)?

200
The probability of at least 8 successes in 12 trials given a probability of success of 45%.
What is DISTR (or 2nd VARS)--> 1-binomcdf(12,.45,7)?
300
When some groups in the population are left out of the process of choosing a sample
What is undercoverage?
300
A z-score of -3.45
What is "The data value is 3.45 standard deviations below the mean"?
300

What are the conditions for a binomial setting?

Binary

Independent

Number

Success

300

The rule for finding the probability of a female given that they are an AP Stats student. Answer using probability notation.

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

300
The z* for a 92% confidence interval
What is DISTR (or 2nd VARS)--> invNorm(.96)?
400

A sample where the population is divided into groups based on close proximity and then a random sample of groups are chosen.  Every entity in a randomly selected group makes up your sample.

What is cluster sampling?

400

95% Confidence level for a population proportion

What is "If we take many samples of the same size from this population, about 95% of them will result in an interval that captures the true parameter."?

400

The equation for the standard deviation of the difference between two random variables.

What is the square root of the sum of the variances of the two random variables?

400

Mr. Bunting makes 78% of free throws he takes.  He will shoot 10 free throws.  What is the probability that he makes exactly 6 free throws?

What is .11?

400

What calculator function will you use to calculate a confidence interval for the difference in population proportions? 

2-PropZInt

500
The effects of two variables on the response cannot be distinguished from each other.
What is confounding?
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 interval from - 4.25 to -1.33 captures the true mean difference."?

500

When a researcher fails to reject the Null hypothesis, and the null hypothesis is actually false.

What is a Type II error?

500

The acronym used to determine if a situation is a geometric setting.

What is BITS:

Binary

Independent

Trials are not fixed

Success

500

What calculator function can you use to calculate the degrees of freedom for a t-test for difference of means?

2-sampTTest

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