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The Category Of Hard Questions and Riddles.
100

The first part of this graph type: "___ and Leaf plot."

What is a Stem?

100

The symbol used to represent the Standard Deviation of a population.

What is 𝜎/Lowercase Sigma?

100

What is the 10% condition for Confidence Intervals?

n < .10(N). 

100

What is the formula used to represent a linear line on a graph?

y=ax+b

100

Why can't an obtuse angle win an argument?

Because it's never right.

200

This is the difference between a Histogram and a Bar Graph.

Histograms are made up of different categories.

200

The acronym used to remember the conditions to perform a linear regression test.

What is LINER?

200

What is block sampling?

Getting data from groups of similar people/things.

200

What is the formula used to find the Z-score?

z=x-mu/standard deviation

200

In a room of randomly selected people, what is the minimum number of people required to have at least a 50% chance that at least two people in the room share the exact same birthday (month and day)?

23.

300

The term used for when data is mostly on one side of the graph.

What is Skew?

300

The name of This Symbol ∑.

What is Sigma/Sum?

300
The formula used to get the mean of a sample.
What is Total/Number of Items?
300

How do you find the standard error of the mean?

SE = standard deviation/square root of sample population

300

A rare disease affects 1% of the population. A screening test for this disease is 99% accurate (i.e., it has a 99% true positive rate and a 99% true negative rate). If a random person tests positive, what is the probability that they actually have the disease?

50%.

400

A data point far away from all others.

What is an Outlier?

400

The variable representing the Sample Mean.

What is x̄/X Bar?

400

What is the formula used to get the chi-squared value of a table?

What is (Observed-Expected)^2 over Expected

400

How do you find the range of a data sample?

Minimum - Maximum valie

400
You are trapped in a dungeon with 3 doors. Behind one is the exit; behind the other two are murderous demons. You choose Door 1. The guard, who knows what is behind all the doors, opens Door 3, revealing a demon. He then asks: "Do you want to switch to Door 2?" What is the probability of surviving if you switch?

66%.

500

A type of graph where the different responses to a question are plotted on a circle.

What is a Pie Chart?

500

The variable representing Population Mean.

What is μ/Mu?

500

What is the formula to find Standardized test statistic?

What is Statistic-Parameter/Standard error of the statistic?

500

How do you find the median?

Find the middle bit of data.

500

What is more likely: Two 6 sided die landing on 1, or one 20 sided die landing on 20?

One 20 sided die landing on 20.