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Stats example exam
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Preguntas del test (33)
11.Which of the following is an example of quantitative data?
- Aa. the player’s number on a baseball uniform
- Bb. the serial number on a one-dollar bill
- Cc. the part number of an inventory item
- Dd. the number of people in a waiting line
22. Which of the following is an example of categorical data?
- Aa. social security number
- Bb. score on a multiple-choice exam
- Cc. height, in meters, of a diving board
- Dd. number of square feet of carpet
3When the data are labels or names used to identify an attribute of the elements, the variable has which
scale of measurement?- Aa. nominal
- Bb. ordinal
- Cc. interval
- Dd. ratio
44. When the data have the properties of ordinal data and the interval between observations is expressed in
terms of a fixed unit of measure, the variable has which scale of measurement?- Aa. nominal
- Bb. ordinal
- Cc. interval
- Dd. ratio
55. A Scanner Data User Survey of 50 companies found that the average amount spent on scanner data per
category of consumer goods was $387,325 (Mercer Management Consulting, Inc., April 24, 1997). The
$387,325 is an example of- Aa. categorical data
- Bb. quantitative data
- Cc. a descriptive statistic
- Dd. Both quantitative data and a descriptive statistic are correct
66.The major applications of data mining have been made by companies with a strong _______ focus.
- Aa. consumer
- Bb. manufacturing
- Cc. exporting
- Dd. research and development
7Exhibit 1-1
In a recent study based upon an inspection of 200 homes in Daisy City, 120 were found to violate one
or more city codes.
7.Refer to Exhibit 1-1. The city manager released a statement that 60% of Daisy City's 3,000 homes are in
violation of city codes. The manager's statement is an example of- Aa. a census
- Bb. an experiment
- Cc. descriptive statistics
- Dd. statistical inference
8Exhibit 1-1
In a recent study based upon an inspection of 200 homes in Daisy City, 120 were found to violate one
or more city codes
9.Refer to Exhibit 1-1. The manager's statement that 60% of Daisy City's 3,000 homes are in violation of
city codes is- Aa. an exactly correct statement
- Bb. only an approximation, since it is based upon sample information
- Cc. obviously wrong, since it is based upon a study of only 200 homes
- Dd. None of the other answers are correct
910. A graphical method that can be used to show both the rank order and shape of a data set simultaneously
is a- Aa. relative frequency distribution
- Bb. pie chart
- Cc. stem-and-leaf display
- Dd. pivot table
10Exhibit 1-1
In a recent study based upon an inspection of 200 homes in Daisy City, 120 were found to violate one
or more city codes.
8.Refer to Exhibit 1-1. The Daisy City study described above is an example of the use of a- Aa. census
- Bb. sample
- Cc. probability
- Dd. population
1111. A researcher is gathering data from four geographical areas designated: South 1, North 2, East 3, West 4
- Aa. categorical data
- Bb. quantitative data
- Cc. directional data
- Dd. either quantitative or categorical data
1212. A frequency distribution is
- Aa. a tabular summary of a set of data showing the fraction of items in each of several
nonoverlapping classes - Bb. a graphical form of representing data
- Cc. a tabular summary of a set of data showing the number of items in each of several
nonoverlapping classes - Dd. a graphical device for presenting categorical data
- Aa. a tabular summary of a set of data showing the fraction of items in each of several
1313. In a cumulative relative frequency distribution, the last class will have a cumulative relative frequency
equal to- Aa. one
- Bb. zero
- Cc. 100
- Dd. None of the other answers are correct.
1414. Excel's __________ can be used to construct a frequency distribution for quantitative data.
- Aa. COUNTIF function
- Bb. SUM function
- Cc. PivotTable Report
- Dd. AVERAGE function
1515. Excel's Chart Tools does not have a chart type for constructing a
- Aa. bar chart
- Bb. pie chart
- Cc. histogram
- Dd. stem-and-leaf display
1616. Which of the following is not a measure of variability of a single variable?
- Aa. range
- Bb. covariance
- Cc. standard deviation
- Dd. coefficient of variation
1717. The mean of a sample is
- Aa. always equal to the mean of the population
- Bb. always smaller than the mean of the population
- Cc. computed by summing the data values and dividing the sum by (n 1)
- Dd. computed by summing all the data values and dividing the sum by the number of items
1818. After the data has been arranged from smallest value to largest value, the value in the middle is called the
- Aa. range
- Bb. median
- Cc. mean
- Dd. None of the other answers are correct
1919. If a data set has an even number of observations, the median
- Aa. can not be determined
- Bb. is the average value of the two middle items
- Cc. must be equal to the mean
- Dd. is the average value of the two middle items when all items are arranged in ascending order
2020. The most frequently occurring value of a data set is called the
- Aa. range
- Bb. mode
- Cc. mean
- Dd. None of the other answers are correct.
2121. Excel's __________ function can be used to compute the mean.
- Aa. MEAN
- Bb. AVERAGE
- Cc. MEDIAN
- Dd. MODE
2222. The 50th percentile is the
- Aa. mode
- Bb. median
- Cc. mean
- Dd. third quartile
2323. The interquartile range is
- Aa. the 50th percentile
- Bb. another name for the variance
- Cc. the difference between the largest and smallest values
- Dd. the difference between the third quartile and the first quartile
2424. The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals
- Aa. 0
- Bb. 4096
- Cc. 8
- Dd. 6,561
2525. Excel's __________ function can be used to compute the sample variance.
- Aa. MAX
- Bb. MODE
- Cc. VAR.S
- Dd. STDEV
2626. The coefficient of variation is
- Aa. the same as the variance
- Bb. the square root of the variance
- Cc. the square of the standard deviation
- Dd. None of the other answers are correct.
2727. A(n) __________ is an unusually small or unusually large data value.
- Aa. sample statistic
- Bb. median
- Cc. z-score
- Dd. outlier
2828. The correlation coefficient ranges between
- Aa. 0 and 1
- Bb. -1 and +1
- Cc. minus infinity and plus infinity
- Dd. 1 and 100
2929. If the data distribution is symmetric, the skewness is
- Aa. 0
- Bb. .5
- Cc. 1
- Dd. None of the other answers is correct.
30Exhibit 3-1
A researcher has collected the following sample data.
5 12 6 8 5
6 7 5 12 4
30. Refer to Exhibit 3-1. The median is- Aa. 5
- Bb. 6
- Cc. 7
- Dd. 8
31Exhibit 3-1
A researcher has collected the following sample data.
5 12 6 8 5
6 7 5 12 4
31. Refer to Exhibit 3-1. The mode is- Aa. 5
- Bb. 6
- Cc. 7
- Dd. 8
32Exhibit 3-1
A researcher has collected the following sample data.
5 12 6 8 5
6 7 5 12 4
32. Refer to Exhibit 3-1. The mean is- Aa. 5
- Bb. 6
- Cc. 7
- Dd. 8
33Exhibit 3-1
A researcher has collected the following sample data.
5 12 6 8 5
6 7 5 12 4
33. Refer to Exhibit 3-1. The 75th percentile is- Aa. 5
- Bb. 6
- Cc. 7
- Dd. 8
Información
- Descripción
- Test sobre Stats example exam, creado por Simon Rizell el 09/10/2017.
- Autor
- Simon Rizell
- Idioma
- English
- Visitas
- 5
- Historial
- Creado el 9 oct 2017 · actualizado el 9 oct 2017
- Valoración
- Aún sin valoraciones Valora este test