1. Under inferential statistics, we study

tables composed of summary measures

the methods to make decisions about one or more populations based on sample results

how to make decisions about a mean, median, or mode

how a sample is taken from a population

2. Whether or not a university's enrollment increased from last year to this year is an example of qualitative or quantitative data?

3. Classify the variable as discrete or continuous. - Weight of all professional basketball players.

4. An independent group wants to determine if the consumption of gasoline has increased due to changes in price. The group randomly selects 320 gas stations from 12 different states and collects data from the month of the year when gas is the cheapest and from the month of the year when gas is the most expensive. The data shows no significant difference in gas consumption between the two months. In this example, what is the variable being studied?

The 320 gas stations chosen.

The 12 different states.

The consumption of gasoline.

The price of gasoline.

5. The following table gives the frequency distribution of the number of telephones owned by a sample of 50 households selected from a city.

Number of Telephones Owned	f
0	2
1	20
2	15
3	5
4	8

The relative frequency of the second class, rounded to two decimal places, is:

*1

The number of households which own more than one telephone is:

*2

The percentage of households which own three or more telephones is:

*3%

The number of households which own one or two telephones is:

*4

The percentage of households which do not own a telephone is:

*5

The number of classes for this frequency distribution table is:

*6

Answer *1:exact number, no tolerance Answer *2:exact number, no tolerance Answer *3:exact number, no tolerance Answer *4:exact number, no tolerance Answer *5:exact number, no tolerance Answer *6:exact number, no tolerance