Probability
Inference tests
Sampling
Rhode Island Trivia
General Trivia
200
If you roll a six-sided die twice in a row, what is the probability of rolling a three and then an even?
1/12
200
What inference test would you use if you had two or more variables and one population?
Chi-squared independence test
200
Billy works at a supermarket and wants to survey people who buy groceries. He uses a random number generator and gets 5, so he surveys the fifth person who walks into the supermarket and surveys every 30th person after the first person. What kind of sampling method is this?
Systematic random sample
200
What's the capital of Rhode Island?
Providence
200
Which acclaimed chef is the owner of Hell's Kitchen?
Gordon Ramsay
400
Joe's Juice offers orange, strawberry, and apple juice. The drink can come in a cup size of small, medium, or large. The amount of possible combinations is...
9
400
Given this criteria and sigma is known, what is the test:
- simple random sample
-sampling distribution of sample means is approximately normal(justified with a sufficiently large n)
- population >= 10 x n
1 - sample z test
400
What do you need in order to establish causation?
A controlled experiment with imposed treatment
400
What is the land area of Rhode Island? (closest answer wins)
1,214 sq. mi.
400
What is a group of crows called?
A murder
600
A fair coin is flipped 200 times. What is the probability of getting at least 80 heads?
0.9972
1-binomcdf(200, .5, 80)
600
What is the build for a 1-sample t confidence interval?
600
A radio station calls 1000 households to conduct a survey, asking whether people take public transportation to work or drive themselves to work. 635 of the households are recorded as picking up the phone, and 365 of the households are recorded as not picking up the phone. 435 of the households who picked up said that they drove themselves to work and 200 said that they took public transportation. What type of bias does this sampling method portray?
Nonresponse bias
600
What is the population of Rhode Island? (closest answer wins)
1.1 million
600
Who was the first woman to win a noble prize?
Marie Curie
800
Assume that there is a test for cancer which is 95% accurate. Additionally, assume that .8% of people actually have cancer (4 out of 500 people). What percent are false positives?
P(no cancer AND positive) = (.992)(.05) = 0.0496 = 4.96%
800
What is the difference between finding the critical value for a 2 proportion z test and a 2 sample z test?
p̂ is pooled for the 2 proportion z test.
800
What is the difference between a sample and a sampling distribution?
Sample: the sample distribution is the distribution formed when ONE sample of the size of a population is analyzed
Sampling: the sampling distribution of a sample mean is the distribution formed by taking every sample of size and finding the mean of each sample
800
What year did Rhode Island become a state? (closest answer wins)
May 4, 1776
800
How many bones are in the human body?
206
1000
Assume that there is a test for drug use that is 96% accurate( if someone is a drug user, the test will be positive 96% of the time, and if one is not a drug user, the test will be negative 96% of the time). Assume further that .2% of all employees at a certain large company are drug users. What are the chances that someone is not a drug user given that the test is positive?
4.59%
P(not user/positive) = 0.00192/0.04184 = 0.0459
1000
Given a significance level for a one-tailed left test with a significance level (α)=0.01, H0: μ0=200, Ha: μa<200, n=6, and σ=3. Find the power of the test given that μa=198.
0.38856
1000
Several groups are selected, and a subgroup is selected within each group. Within each subgroup, individuals are selected for the sample. What sampling type is this?
Multistage sample
1000
Name the colors on the Rhode Island flag.
White, yellow, blue
1000
How much is College Board worth? (closest answer wins)
1.7 Billion dollars