Gen. Statistics
T/F: More types of calculations can be performed with data at the nominal level than with data at the interval level.
False. More types of calculations can be performed with data at the interval level with data at the nominal level.
What are some benefits of using graphs of frequency distributions?
It can be easier to identify patterns of a data set by looking at a graph of the frequency distribution.
What are some benefits of representing data sets using frequency distributions?
Organizing the data into a frequency distribution can make patterns within the data more evident.
Statistic/Parameter The average age of men who have walked on the moon was 39 years, 11 months, 15 days
Parameter
The number of garages for each house on a street.
Population, because it is a collection of the number of garages for all houses on the street.
The diastolic blood pressure of 10 patients in a hospital containing 200 patients.
Sample, because the collection of 10 patients' blood pressures is a subset of all patients in the hospital
The temperature in four state capitals out of 50.
Sample, because the collection of temperatures for four state capitals is a subset of all state capitals.
In a poll, 1,004 men in a country were asked whether they favor or oppose the use of "federal tax dollars to fund medical research using stem cells obtained from human embroyos." Among the respondents, 46% said that they were in favor. Identify the population and the sample. Identify the sample for the given problem.
The 1,004 men selected
A polling organization contacts 1659 undergraduates who attend a college and live outside the United States and asks whether or not they had taken a course in conversational English during their studies. What is the sample in the study?
The 1659 undergraduates who attend a college and live outside the United States.
After constructing a relative frequency distribution summarizing IQ scores of college students, what should be the sum of the relative frequencies?
if percentages are used, the sum should be 100%. If proportions are used, the sum should be 1.
How is a sample related to a population?
A sample is a subset of a population
T/F: A statistic is a measure that describes a population characteristic.
False. A statistic is a measure that describes a sample characteristic.
T/F: In a frequency distribution, the class width is the distance between the lower and upper limits of a class.
False. In a frequency distribution, the class width is the distance between the lower or upper limits of consecutive classes.
In a poll, 1,004 men in a country were asked whether they favor or oppose the use of "federal tax dollars to fund medical research using stem cells obtained from human embroyos." Among the respondents, 46% said that they were in favor. Identify the population and the sample. What is the population in the given problem?
All men in the country
The average annual salary of 50 of a company's 800 employees is 54,000$
Statistic, because the data set of salaries of 50 employees is a sample.
A polling organization contacts 1659 undergraduates who attend a college and live outside the United States and asks whether or not they had taken a course in conversational English during their studies. What is the population in the study?
Undergraduates who attend a college and live outside the United States