Descriptive Statistics: Sofia Quiz1.42008/05/12 18:02:17 GMT-52008/06/27 10:43:39.257 GMT-5BarbaraIllowskycnx@cnx.orgSusanDeancnx@cnx.orgConnexionscnx@cnx.orgdescriptiveelementaryquizsofiastatisticsThis module is a quiz containing 10 multiple choice questions covering topics related to descriptive statistics.
Note: This module is currently under revision, and its content is subject to change. This module is being prepared as part of a statistics textbook that will be available for the Fall 2008 semester.The following table shows the lengths of 64 international phone calls using a $5 prepaid calling card.
Frequency of Phone Call LengthsData (minutes)FrequencyRelative FrequencyCumulative Relative Frequency4250.3906141524100.15633490.14064440.06255410.01561.0000
Using the data, determine which ONE of the answers is correct:AThe mean and the median are equal.BThe mean is smaller than the median.CThe mean is larger than the median.Interpret the following box plot:
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Which of the following is correct?
A75% of the data are at most 5.BThere is about the same amount of data from 2-5 as there is from 5-7.CThere are no data values of 3.D50% of the data are 4.In a set of data, if all of the data appear with the same frequency, then:AThe standard deviation is always 0.BThe mean is always larger than the standard deviation.CAll of the data have the same value.DThe boxplot does not always look symmetrical.The following table shows the lengths of 64 international phone calls using a $5 prepaid calling card.
Frequency of Phone Call LengthsData (minutes)FrequencyRelative FrequencyCumulative Relative Frequency4250.3906141524100.15633490.14064440.06255410.01561.0000
Find the 60th percentile.A14B60C15D0.2344Consider the following data set:46612181818200What value is 2 standard deviations above the mean?AThere is not enough informationBApproximately -98CApproximately 102DApproximately 169Consider the following data:1416162225383838382000Which of the measures of central tendency would be the least useful?AmeanBmodeCmedianThe following table shows the lengths of 64 international phone calls using a $5 prepaid calling card.
Frequency of Phone Call LengthsData (minutes)FrequencyRelative FrequencyCumulative Relative Frequency4250.3906141524100.15633490.14064440.06255410.01561.0000
What percent of the data is either 34 or 44 minutes?AApproximately 78%BApproximately 13%CApproximately 98%DApproximately 20%Sixty-four faculty members were asked the number of cars they owned (including spouse's and children's cars). The results are given in the histogram below:
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The number of responses that were either "1" or "3" is approximately:A0.4B27C40D2Sixty-four faculty members were asked the number of cars they owned (including spouse's and children's cars). The results are given in the histogram below:
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Which of the following DOES NOT describe the data?Athere are approximately 10 faculy members that own 7 carsBskewed leftCThere are no values of 5Dskewed rightSixty-four faculty members were asked the number of cars they owned (including spouse's and children's cars). The results are given in the histogram below:
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