### 52 terms by heyheyblondie

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### the difference between qualitative and quantitative variables

qualitative variables to NOT use numbers, quantitative variables DO use numbers

### mutually exclusive

only has one category

### exhaustive

must have at least one category

1.Collecting
2. Organizing
3.presenting
4. interpreting
5.analyzing

### What are 2 types of statistics

descriptive and inferential

continuous

### 4 levels of measurement

nominal ordinal interval ratio

ordinal

TRUE

sample

ratio

pie chart

### when a class interval is expressed as 100 up to 200

observations with values of 200 are EXCLUDED

### the relative frequency for a class is computed as the

class frequency divided by total frequency

### Why are unequal class intervals sometimes used in frequency distribution

to avoid a large number of empty classes

Ratio

TRUE

### Rank the measures of dispersion in terms of their relative computational difficulty from least to most difficult

Range, mean deviation, variance

TRUE

TRUE

TRUE

Predicting

Geometric Mean

Mean and Median

### a row of a stem-and-leaf chart appears as follows: 3I 0 1 0 5 7 9. Assume that the data is rounded to the nearest unit.

The maximum value in the class is 39

111

### What statistics are needed to draw a box plot?

minimum, maximum, median, first and third quartiles

### The coefficient of variation for a set of annual incomes is 18%; the coefficient of variation for the length of service with the company is 29%. What does this indicate?

More dispersion in the lengths of service compared with incomes

0% - 100%

### The probability of 2 or more events occurring concurrently is called

joint probability

FALSE

TRUE

FALSE

TRUE

TRUE

TRUE

FALSE

FALSE

FALSE

FALSE

TRUE

TRUE

TRUE

TRUE

TRUE

FALSE

TRUE

TRUE

FALSE

TRUE

Random sampling

Sampling error

Example: