1.2 Types of Data
Determine whether the value given below is from a discrete or continuous data set. In a test of a method of gender selection comma 689 couples used the XSORT method and 547 of them had baby girls.
A discrete data set because there are a finite number of possible values
Determine whether the given value is a statistic or a parameter. In a study of all 4913 students at a college comma it is found that 55 % own a computer.
Parameter because the value is a numerical measurement describing a characteristic of a population.
Determine whether the data described below are qualitative or quantitative and explain why. The types of movies left parenthesis drama comma comedy comma etc. right parenthesis
Qualitative because the data don't measure or count anything.
Determine whether the given value is a statistic or a parameter. Upper A sample of seniors is selected and it is found that 45 % own a television.
Statistic because the value is a numerical measurement describing a characteristic of a sample.
State whether the data described below are discrete or continuous, and explain why. The heights of different refrigerators offered by manufacturers
The data are continuous because the data can take on any value in an interval
State whether the data described below are discrete or continuous, and explain why. The heights of trees in a forest
The data are continuous because the data can take on any value in an interval
State whether the data described below are discrete or continuous, and explain why. The exact ages in hours of different cockroaches found in a certain city
The data are continuous because the data can take on any value in an interval.
State whether the data described below are discrete or continuous, and explain why. The exact weights left parenthesis in pounds right parenthesis of babies born in a certain country nothing
The data are continuous because the data can take on any value in an interval.
State whether the data described below are discrete or continuous, and explain why. The weights of dogs left parenthesis in pounds right parenthesis at a dog show
The data are continuous because the data can take on any value in an interval.
Determine whether the given value is a statistic or a parameter. A homeowner measured the voltage supplied to his home on all 365 days of a given year, and the average (mean) value is 125.2 volts.
The given value is a parameter for the year because the data collected represent a population
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Eye colors
The nominal level of measurement is most appropriate because the data cannot be ordered.
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Blood lead levels of "low comma " "medium comma " and "high"
The ordinal level of measurement is most appropriate because the data can be ordered comma but differences cannot be found or are meaningless.
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Ranks of cars evaluated by a consumer's magazine
The ordinal level of measurement is most appropriate because the data can be ordered comma but differences cannot be found or are meaningless. nothing
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate for the data below. Mood levels of "happy comma " "alright comma " and "sad"
The ordinal level of measurement is most appropriate because the data can be ordered comma but differences left parenthesis obtained by subtraction right parenthesis cannot be found or are meaningless. nothing
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Monthly temperatures: 63 degrees Upper F comma 68 degrees Upper F comma 73 degrees Upper F comma 78 degrees Upper F comma and 83 degrees Upper F
interval
Determine which of the four levels of measurement (nominal, ordinal, interval, ratio) is most appropriate. Hair colors
nominal
Identify the level of measurement of the data, and explain what is wrong with the given calculation. In a survey, the favorite foods of respondents are identified as 0 for italian food comma 1 for mexican food comma 2 for chinese food comma and 3 for anything else. The average (mean) is calculated for 728 respondents and the result is 1.1 . The data are at the ____________ level of measurement. What is wrong withe the given calculation?
nominal Such data are not counts or measures of anything, so it makes no sense to compute their average (mean).
Identify the level of measurement of the data, and explain what is wrong with the given calculation. In a set of data, movie ratings are represented as 0 for 1 star comma 1 for 2 stars comma and 2 for 3 stars. The average (mean) of the 523 movie ratings is 0.9 . The data are at the ______________ level of measurement. What is wrong with the given calculation?
ordinal Such data should not be used for calculations such as an average
Determine if the following statement represents a meaningful ratio, so the ratio level of measurement applies. A movie with a 4-star rating is twice as good as one with a 2-star rating.
the ratio level of measurement does not apply
A particular country has 60 total states. If the areas of 20 states are added and the sum is divided by 20, the result is 209 comma 098 square kilometers. Determine whether this result is a statistic or a parameter.
the result is a statistic because it describes some characteristic of a sample.
