15

Question 1

Observation/case?

Answer 1

Collection of measurements for a single outcome or subject.

Question 2

Contingency table?

Answer 2

A table that lists the observed frequencies of different pairings of outcomes from at least two categorical variables.

Question 3

Factor?

Answer 3

Each categorical variables when we talk about contingency table.

Question 4

Level?

Answer 4

Each outcome for a categorical variable

Question 5

!Mosaic plot?

Answer 5

A graph of two categorical variables with levels whose rectangles represent proportion of data set in the y axis and the lengths of each rectangle in the x axis represent proportion of the categorical variable vs all categorical variables.

Question 6

Given two numerical variables, random variables, then a scatter plot is?

Answer 6

Plots data in dots and then find a linear trend.

Question 7

Faithful dataset gives?

Answer 7

Waiting time between eruptions and duration of eruption for old faithful where you have a scatter plot with two big lumps.

Question 8

Point estimator?

Answer 8

For parameter theta is an estimate theta^_n for theta based on a sample of size n.

Question 9

Sampling distribution of a statistic theta^_n is?

Answer 9

The probability distribution of theta^_n with theta^_n being the random variable.

Question 10

Theta^_n can be thought of as?

Answer 10

Random variable.

Question 11

Sample proportion?

Answer 11

X1, X2, …, Xn a random sample of size n where each X is a random variable, either 1 or 0, in which we take the average of the random variables and set it to p^, the proportion of successes, where each p^ is a point estimator.

Question 12

Sample mean?

Answer 12

Random sample of size n from a population with mean mu, and then a sample mean X bar is the average of sample values.

Question 13

Things that jump less around the mean will give you the?

Answer 13

Better guess.

Question 14

Can you take the variance of the sample mean?

Answer 14

Yes