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STA2023 PBSC Exam 1 Questions and Answers Fully Solved
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Exam of 3 pages for the course PBSC at PBSC (STA2023 PBSC Exam 1)
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STA2023 PBSC Exam 1Parameter - answer is a numerical measurement describing some characteristic of a
population.
POPULATION --- PARAMETER
Statistic - answer is a numerical measurement describing some characteristic of a
sample.
STATISTIC --- SAMPLE
In a Harris Interactive survey of 2276 adults in the United States, it was found that 33%
of those surveyed never travel using commercial airlines. Identify the population and
sample. Is the value 33% a statistic or a parameter? - answer Statistic
Which of the following is to describe discrete data?
A. The number of people surveyed in each of the next several years for the National
Health and Nutrition Examination Surveys.
B. The exact foot lengths (measured in cm) of a random sample of statistics student.
C. The exact times that randomly selected drivers spend texting while driving during the
past 7 days - answerA. The number of people surveyed in each of the next several
years for the National Health and Nutrition Examination Surveys.
In a study of AA flights from JFK in New York to LAX in Los Angeles, 48 flights are
randomly selected and the average (mean) arrival time is 8.9 minutes late. Is this a
statistic or a parameter? - answerStatistic
According to the Census Bureau, the total number of housing units in the United States
is 132,802,859. Is this a statistic or a parameter? - answerParameter
In a study of 400 babies born at four different hospitals in New York State, it was found
that the average (mean) weight at birth was 3152.0 grams. Is this a statistic or a
parameter? - answerStatistic
A study was conducted of all 2223 passengers aboard the Titanic when it sank. Is this a
statistic or a parameter? - answerParameter
Discrete - answerNumber of possible values is either a finite or "countable" number.
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