question

How do a parameter and a statistic differ?

answer

A parameter is a numerical measurement of a population; a statistic is a numerical measurement of a sample.

question

Determine whether the given value is a statistic or a parameter:
The mean weight for doctors is 170 lbs

answer

The value is a parameter because it is a numerical measurement describing some characteristic of a population.population.

question

Determine whether the given value is a statistic or a parameter:
In a study of all 3915 students at a college, it is found that 35% own a television

answer

Parameter because the value is a numerical measurement describing a characteristic of a population

question

Determine whether the given value is a statistic or a parameter:
A homeowner measured the voltage supplied to his home on one day a week for a given year, the average (mean) value is 137.2 volts

answer

The given value is a statistic for the year because the data collected represents a sample

question

A particular country has 45 total states. If the areas of 30 states are added and the sum is divided by 3030, the result is 192 comma 332192,332 square kilometers. Determine whether this result is a statistic or a parameter.

answer

The result is a statistic because it describes some charactertistic of a sample.

question

Determine whether the given value is from a discrete or continous data set:
When a bus is randomly selected, it is found to have a engine with 143 hp

answer

It is from continuous data set because the number of possible values in infinite and not countable.

question

Determine whether the given value is from a discrete or continuous data set:
When a car is randomly selected and weighed, it is found to weight 1689.9 kg

answer

A continuous data set because there are infinetly many possible values and those values cannot be counted.

question

Determine whether the given value is from a discrete or continuous data set:
Volume of liquid in a glass is 350 mL

answer

Continuous

question

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate:
Favorite types of music

answer

Nominal

question

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate:
Car lengths measured in feet

answer

The ratio level of measurement is the most appropriate because the data can be ordered, differences can be found and are meaningful, and there is a natural starting zero point.

question

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate:
Types of movies (drama, comedy, adventure, documentary, ect.)

answer

The nomial level of measurement is the most appropriate because data cannot be arranged in ordering scheme.

question

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate:
Flight numbers

answer

The nominal level of measurement is the most appropiate because the data cannot be ordered.

question

Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate:
Mood levels of "happy, alright, sad"

answer

The ordinal level of measurement is the most appropriate because the data can be ordered, but differences (obtained by subtraction) cannot be found or are meaningless.

question

In a survey, the favorite favorite sports of respondents are identified as 11 for basketball, 22 for baseball, 33 for football, and 44 for anything else. The average (mean) is calculated for 671 respondents and the result is 1.5.
The data is __ level and what is wrong with the calculation?

answer

The data is at the nominal level of measurement.
-such data are not counts or measures of anything, so it makes no sense to commute their average (mean)