Chapter 1

Question 1

Summary measure describing the characteristic of the sample that is computed using sample data

Answer 1

Statistic

Question 2

Summary measure describing the characteristic of the sample that is computed using population data

Answer 2

parameter

Question 3

Field of stat comprised of methods concerned with collecting, describing, and analyzing a set of data

Answer 3

Descriptive Statistics

Question 4

Field of stat comprised of methods concerned with analysis of sample data leading to predictions or inferences about the population

Answer 4

Inferential Statistics

Question 5

Process that can be repeated under similar conditions but whose outcome cannot be predicted with certainty beforehand

Answer 5

Random Experiment

Question 6

Collection of all possible outcomes of a random experiment

Answer 6

sample space

Question 7

Lists down all elements belonging to the set

Answer 7

roster method

Question 8

states a rule that elements must satisify in order to belong in the set

Answer 8

rule method

Question 9

TRUE OR FALSE

The sample space is unique

Answer 9

false, it is not

The representation depends on the characteristic of interest that will facilitate the assignment and computation of probabilities

Question 10

subset of the sample space whose probability is defined

Answer 10

event

Question 11

Two events are [blank] if both sets have no elements in common

Answer 11

mutually exclusive, pairwise disjoint

Question 12

Properties of probability

Answer 12

nonnegativity (0<P(A)<1)
norming axiom (P(omega) = 1)
finite additivity (union of mutually exclusive events)

Question 13

assigns probabilities before the experiment (equiprobable outcomes)

Answer 13

a priori/classical approach

Question 14

assigns probabilities to events by repeating the experiment a large number of times

Answer 14

a posteriori/relative frequency

Question 15

a function whose value is a real number determined by each sample point in the sample space

Answer 15

random variable

Question 16

TRUE OR FALSE

Each outcome of the random variable must be mapped to exactly one real number

Answer 16

TRUE

Question 17

TRUE OR FALSE

the CDF of a random variable X is not referred to as its distribution

Answer 17

FALSE

Question 18

TRUE OR FALSE

The distribution of the random variable provides us complete information about the behavior of the random variable X

Answer 18

TRUE

Question 19

what is the random variable in a binomial experiment?

Answer 19

number of times a success has occuered in a total of n trials

Question 20

If X follows a normal distribution with myu and sigma squared. what are the percentages at 1, 2, 3 standard deviations away from the mean?

Answer 20

68, 95, 99