Question

1. Find the correct explanation to every name of categories of data

a. Nominal scale

b. ordinal scale

c. interval scale

d. ratio scale

- is a number that can be expressed as a quotient or fraction

- allows for the degree of difference between items, but not the ratio between them

- is a set lying between two numbers

- differentiates between items or subjects based only on their names or (meta-) categories and other qualitative classifications they belong to

2. Selective dispersion is ....

a. biased estimation of general variance

b. unbiased estimate of general average

c. biased estimate of general average

d. unbiased estimate of general variance

3. A universal way to specify a random variable X is to specify its ........ distribution

select one:

a. line

b. function

c. number

d. raw

4. Discrete is random variable, .......

select one:

a. which is determined by the distribution density

b. a set of values which fills a numerical gap

c. which is defined by the distribution polygon

d. which takes on separate, isolated values

5. The sample average is....

select one:

a. biased estimation of general variance

b. unbiased estimate of general average

c. biased estimate of general average

d. unbiased estimate of general variance

6. Statistical dependence is called

select one:

a. exact formula linking variables

b. any relation of variables

c. the relationship of variables, which is superimposed by the influence of random factors

d. the relationship of variables without taking into account the effects of random factors

Answer 1