qmb 3200 fsu bliss ch 3 quiz

Term

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there are five rows of students seated in a statistics class. the following table shows the number of students in each row and the average score of the most recent exam for that row.

row # students row average
1 6 823
2 7 914
3 4 850
4 5 783
5 6 891

what is the average exam score for this class

83
84.7
85.7
86.8

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Terms in this set (33)

85.7

the mode sngl function in excel will correctly identify more than one more in a data set

true
false

false

the following data represents the ages of a household that consists of five people

39 37 12 7. 7

assuming this household represents a population, the mean of this data set is _______

18.8
19.2
19.6
20.4

20.4

the following data represents the number of sony tvs sold per day at a particular costco over a random sample of 5 business days

9. 2 7. 7. 5

the median of this sample is _______

4
5.2
7
8

the following data represents the number of sony tvs sold per day at a particular costco over a random sample of 5 business days

9. 2. 7. 7 5

the mean of this sample is ____

5.7
6
6.4
6.6

the following data represents the number of sony tvs sold per day at a particular costco over a random sample of 5 business days

9. 2. 7. 7 5

the mode of this sample is _____

2
4
6
7

the _____ is the value in the data set for which half the observations are higher and half the observations are lower

median
mode
mean
average

median

Outliers are extreme values above or below the mean that require special consideration.

true
value

true

there can be more than one mode in a data set

true
false

true

some data sets may not have a mode

true
false

true

the following data represents the number of sony tvs sold per day at a particular costco over a random sample of 5 business days 9. 2. 7. 7. 5 the standard deviation of this sample is _____ 1.2 1.5 2 2.62.6the ______ is the most common and most important measure of variability in the field of statistics range variance median standard deviationstandard deviationthe _____ measures the variability or spread of the data points in a set around the sets mean mode variance median rangevariancethe following data represents the ages of a household that consists of 5 people. assume that the household is considered a population in this example. 39. 37. 12. 7. 7 the standard deviation of this data set is ____ 10.9 12 14.5 1614.5the following data represents the number of sony tvs sold per day at a particular costco over a random sample of 5 business days 9. 2. 7. 7. 5 the range of this sample is ______ 5 6 7 87the average month end closing stock price for company a over the past year is 34.57 with a standard deviation of 4.65. the average month end closing stock price for company b over the same period is 26.15 with a standard of 7.45. based on this data, we can conclude that the stock price for company a is more consistent when compared to the stock price for company b. true falsetruea random sample of 2008 used cars for sale on the market has an average mileage of 71420 miles with a sample standard deviation of 9470 miles. the z score for a used car with 80500 miles in this sample is ___ -1.22 0 0.43 .96.96the average math sat score for incoming freshman at a particular college is 535 with a standard deviation of 60. the coefficient of variation for sat scores at this school is 11.2 13.9 15.6 1811.2the average monthly rent for a two bedroom apartment in city a is 820 with a standard deviation of 86. the average monthly rent for a two bedroom apartment in city b is 790 with a standard deviation of 75. based on this data we can conclude that the rent for two bedroom apartments in city a is more consistent when compared to city b. true falsefalsewhen comparing two samples, the smaller coefficient of variation indicates more consistency (or less variability) within the sample or population true falsetruethe following table represents the number of minutes that 20 airline passengers had to wait in order to pass through security along with the frequency in each class. minutes w security # of passengers 0-10 4 10-20 8 20-30 5 30-40 3 what is the approximate average number of minutes that a passenger waits to pass through security? 14 15.5 17 18.518.5a business school at a particular university has 25 full time faculty. the following table shows the number of faculty grouped by years of teaching experience. years experience # faculty 5-10. 11 10-15 7 15-20 5 20-25 2 what is the approximate average years of teaching experience for this population?12.1the following table represents the number of minutes that 20 airline passengers had to wait in order to pass through security along with the frequency in each class. minutes w security # of passengers 0-10 4 10-20 8 20-30 5 30-40 3 what is the approximate standard deviation for the number of minutes that a passenger waits to pass through security? 9.63 9.88 10.65 10.89.88when calculating the sample mean of grouped data, the value represents an estimate of the true sample mean true falsetruethe following table represents the number of seconds that a particular web page took to load on an iphone 25 users along with the frequency in each class. seconds to load # of iphone users 0-5 secs 4 5-10 secs 7 10-15 secs 3 15-20 secs 10 20-25 secs 1 what is the approximate average number of seconds that this web page took to load on the iphone 11.9 12.5 13.7 1511.9the interquartile range represents the middle _____ of a range 10 25 50 7550the following data shows the number of home runs hit by the top 12 home run hitters during a recent major league baseball season. 43. 41 39 39 38 37 36 34 33 32 32 the interquartile range is _____- 4 4.5 5.5 75.5the first quartile represents the ______ percentile of the data set 10th 25th 50th 75th25ththe following data represent the wait time in minutes for customers calling comcast technical support 14 2 13 7 24 19 12 16 6 9 12 the interquartile range is 7 mins 9mins 10 mins 12 mins9 minswhen using the index point, i, to determine the pth percentile of a data set , round i to the next whole number, if i = p/100 (n) is not a whole number true falsetrueThe sample ____________ measures the direction of the linear relationship between two variables but does not measure the strength of the relationship. variance covariance z score correlation coefficientcovarianceconsider the following data set variable 1 : 2. 7. 5. 10 8 10 14 variable 2: 7. 12. 10 18 11 21 14 the sample correlation coefficient for this data set is ____- -.66 -.21 .50 .70.70the sample correlation coefficient can be equal to any value ____ between -1 and +1 greater than or equal to zero other than zero between - infinity and +infinitybetween -1 and +1