Math 227 - Statistics » Spring 2023 » 01P Statistical and Critical Thinking, Types of Data, Collecting Sample Data

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Question #1
A sample of employees is selected and it is found that 65% own a computer. Is this value a statistic or a parameter?
A.   Parameter because the value is a numerical measurement describing a characteristic of a population.
B.   Statistic because the value is a numerical measurement describing a characteristic of a sample.
C.   Parameter because the value is a numerical measurement describing a characteristic of a sample.
D.   Statistic because the value is a numerical measurement describing a characteristic of a population.
Question #2
A polling company reported that 58% of 2,827 surveyed adults said that they play football. What is the exact value that is 58% of 2,827? (Exact calculations may result in decimals.  Please round to the nearest hundredth.)
A.   1,789.31
B.   1,639.66
C.   1335.33
D.   1,125.99
Question #3
On a test, 66% of the questions are answered correctly. If 36 questions are correct, how many questions are on the test?
A.   55
B.   51
C.   56
D.   45
Question #4
A polling company reported that 47% of 2286 surveyed adults said that they play football. The exact value of 47% of 2286 is 1074.42. Could this result be the actual number of adults who said that they play football? Why or why not?
A.   No, the result could not be the actual number of adults who said that they play football because a count of people must result in a whole number.
B.   Yes, the result could be the actual number of adults who said that they play football because the results are statistically significant.
C.   No, the result could not be the actual number of adults who said that they play football because that is a very rare activity.
D.   Yes, the result could be the actual number of adults who said that they play football because the polling numbers are accurate.
Question #5
Determine whether the data described below are qualitative or quantitative and explain why. The types of climates for different regions (tropical, temperate, arid, etc.) Choose the correct answer below.
A.   The data are quantitative because they consist of counts or measurements.
B.   The data are qualitative because they don't measure or count anything.
C.   The data are quantitative because they don't measure or count anything.
D.   The data are qualitative because they consist of counts or measurements.
Question #6
The weight of Bill's pack as he sets off on a backpacking trip is 48 lb. Does the data come from a discrete or continuous data set?
A.   A discrete data set because the possible values can be counted.
B.   A continuous data set because there are infinitely many possible values and those values can be counted.
C.   A continuous data set because there are infinitely many possible values and those values can be measured.
D.   The data set is neither continuous nor discrete.
Question #7
Nationalities of survey respondents. Which level of measurement is most appropriate for this data?
A.   ratio
B.   nominal
C.   interval
D.   ordinal
Question #8
The temperatures of eight different plastic spheres in Fahrenheit. Which level of measurement is most appropriate for this data?
A.   ordinal
B.   ratio
C.   interval
D.   nominal
Question #9
A researcher interviews 19 work colleagues who work in the cubicles surrounding his desk. Identify the type of sampling used.
A.   systematic
B.   stratified
C.   cluster
D.   convenience
E.   random
Question #10
A sample consists of every 49th student from a group of 496 students. Identify the type of sampling used.
A.   stratified
B.   random
C.   convenience
D.   systematic
E.   cluster

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