Module 1

Question 1

is any specific collection of objects of interest

Answer 1

population

Question 2

is any subset or sub-collection of the population, including the case that the sample consists of the whole population, in which case it is termed a census.

Answer 2

Sample

Question 3

is a number that summarizes some aspect of the population as a whole

Answer 3

A parameter

Question 4

is a number computed from the sample data.

Answer 4

A statistic

Question 5

is a collection of methods for collecting, displaying, analyzing, and drawing conclusions from data.

Answer 5

Statistics

Question 6

is the branch of statistics that involves displaying, and describing data. organizing,

Answer 6

Descriptive statistics

Question 7

is the branch of statistics that involves drawing conclusions about a population based on information contained in a sample taken from that population.

Answer 7

Inferential statistics

Question 8

The sample mean of a set of n sample data is

Answer 8

the number x defined by the formula

Question 9

The population mean of a set of N population data is

Answer 9

the number (u) defined by the formula

Question 10

for which there are an odd number of measurements is the middle measurement when the data are arranged in numerical order

Answer 10

The sample median (1) of a set of sample data

Question 11

for which there are an even number of measurements is the mean of the two middle measurements when the data are arranged in numerical order

Answer 11

The sample median of a set of sample data

Question 12

is the most frequently occurring value

Answer 12

The sample mode (2) of a set of sample data

Question 13

is the number R defined by the formula

Answer 13

The range of a data set

Question 14

is the number s^{2} defined by the formula

Answer 14

The sample variance of a set of n sample data

Question 15

is the square root of the sample variance, hence is the number s

Answer 15

The sample standard deviation of a set of n sample data

Question 16

are the numbers sigma ^ 2 and a defined by the formula

Answer 16

The population variance and population standard deviation of a set of N population data

Question 17

Variables that cannot take the form of decimals

Answer 17

Discrete variables

Question 18

Variables that can take the form of decimals

Answer 18

Continuous variable

Question 19

A function associates a real number to each element in the sample

Answer 19

Random variable