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Stats Exam 1 Pierson Questions and Answers
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Stats Exam 1 Pierson Questions and Answers
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Stats Exam 1 Pierson Questions andAnswers
A table or listing that shows values and how many times each value occurs is: - Answer-
Frequency distribution
What is the simplest, most fundamental level of measurement? - Answer- Nominal
Students are given grades of A, B, C, D, or F on their homework assignments. The use
of letter grades would be an example of what level of measurement? - Answer- Ordinal
The scale of measurement that assumes there is an underlying scale of equal units, but
without an absolute zero point, is the ______ scale of measurement. - Answer- interval
What reflects the interval or interval/ration level of measurement? - Answer- A students
GPA
Determining a person's level of education by asking him/her to indicate the number of
school years completed would involve measurement on a _________ level of
measurement. - Answer- ratio and/or interval
A sample is? - Answer- a portion of a population
Researchers generally want to be able to generalize their results to a _______, but to
do so, they typically carry out their research on the basis of a _______. - Answer-
Population, sample
The marketing director of a company wants to conduct research on the buying habits of
the company's customer base. The entire group of customers would be an example of a
________. - Answer- Population
The marketing director of a company examines data collected from 125 customers and
determines that customers spent an average of $274.55 in purchases from the
company over the past 12 months. The collection or group of 125 customers would
represent a: - Answer- sample
The average IQ score for the entire population of students enrolled at a local community
college would be an example of a __________. - Answer- parameter
A researcher wants to know how many emails senior citizens send to friends each
week. If it were possible to find the average for the entire population of senior citizens, it
would be an example of a _______. - Answer- parameter
, A researcher records the GPA at the end of the semester for each student in a sample
of 50 freshman students. The average of the 50 GPA scores would be a: - Answer-
statistic
The term used to describe all possible cases is: - Answer- population
Statistics that are used to summarize data are referred to as: - Answer- descriptive
statistics
A parameter is: - Answer- a characteristic of a population
Descriptive statistics are used to: - Answer- summarize or describe data
Inferential statistics are used to: - Answer- make statements about a population based
on information from a sample
A statistic is to a sample as: - Answer- a parameter is to a population
The measure of central tendency that is sensitive to extreme scores is the: - Answer-
mean
Mean of the population - Answer-
A measure that summarizes a distribution in terms of its centrality or typically is: -
Answer- a measure of central tendency
The score that is located in the middle of a distribution or the score that cuts a
distribution in half is the: - Answer- median
Mean of a sample - Answer-
Which of the following is NOT a measure of central tendency? - Answer- The average
deviation
Which of the following is NOT a measure of dispersion? - Answer- The median
Which of the following correctly states the relationship between the standard deviation
and the variance? - Answer- The variance is equal to the standard deviation, squared
What is the position of the median in the following distribution?
{ 1, 4, 7, 12, 14, 1, 13, 9, 10 } - Answer- 5.5th score
What is the value of the median in the following distribution?
{ 1, 4, 5, 7, 12, 14, 1, 13, 9, 10 } - Answer- 8
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