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# Math302 quiz 1

Question # 00008929
Subject: Mathematics
Due on: 02/27/2014
Posted On: 02/23/2014 05:55 AM

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##### Question 1 of 20
1.0 Points
Which of the following statements is true regarding the data set 10, 10, 10, 10, and 10?
 A.The range is zero B.The standard deviation equals zero C.The interquartile range equals zero D.all of the above
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##### Question 2 of 20
1.0 Points
Which of the following are the two most commonly used measures of variability?
 A.Variance and median B.Mean and variance C.Variance and standard deviation D.Range and interquartile range
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##### Question 3 of 20
1.0 Points
Which of the following statements are false regarding a boxplot?
 A.Boxplots can be used to either describe a single variable in a data set or to compare two (or more) variables B.The right and left of the box are the third and first quartiles C.The height of the box has no significance. D.The length of the box equals the range of the data.
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##### Question 4 of 20
1.0 Points
The average score for a class of 30 students was 75. The 20 male students in the class averaged 70. The 10 female students in the class averaged:
 A.70 B.85 C.75 D.60
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##### Question 5 of 20
1.0 Points
Which of the following could be a cumulative frequency graph?
 A..apus.edu/access/content/group/science-and-technology-common/Math/LenKellyObjects/MATH302%20Quiz%201/Q1Prob12D.png"> B..apus.edu/access/content/group/science-and-technology-common/Math/LenKellyObjects/MATH302%20Quiz%201/Q1Prob12A.png"> C..apus.edu/access/content/group/science-and-technology-common/Math/LenKellyObjects/MATH302%20Quiz%201/Q1Prob12B.png"> D..apus.edu/access/content/group/science-and-technology-common/Math/LenKellyObjects/MATH302%20Quiz%201/Q1Prob12C.png">
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##### Question 6 of 20
1.0 Points
Which of the following is the graphical analog of a frequency table?
 A.The scatterplot B.The contingency table C.The time series plot D.The histogram
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##### Question 7 of 20
1.0 Points
Data that arise from counts are called:
 A.counted data B.continuous data C.discrete data D.nominal data
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##### Question 8 of 20
1.0 Points
For a boxplot, the box itself represents what percent of the observations?
 A.100% B.middle 50% C.upper 75% D.lower 25%
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##### Question 9 of 20
1.0 Points
The amount of time needed to run the Boston marathon is an example of which type of variable?
 A.continuous B.discrete C.qualitative D.none of the above
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##### Question 10 of 20
1.0 Points
The mode is best described as the
 A.middle observation B.50th percentile C.most frequently occurring value D.same as the average
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##### Question 11 of 20
1.0 Points
A population includes:
 A.only households B.only machines C.only people D.all objects of interest in a particular study
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##### Question 12 of 20
1.0 Points
What type of graph is the figure below?

.apus.edu/access/content/group/science-and-technology-common/Math/LenKellyObjects/MATH302%20Quiz%201/Q1Prob13.png">
 A.ogive B.Pareto chart C.relative frequency histogram D.pictograph
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#### Part 2 of 3 -

##### Question 13 of 20
1.0 Points
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).NOTE:For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.

A statistics professor has just given a final examination in his statistical inference course. He is particularly interested in learning how his class of 40 students performed on this exam. The scores are shown below. 77 81 74 77 79 73 80 85 86 7383 84 81 73 75 91 76 77 95 7690 85 92 84 81 64 75 90 78 7882 78 86 86 82 70 76 78 72 93

Compute the standard deviation of these test scores. Place your answer, rounded to 2 decimal places in the blank. For example, 5.34 would be a legitimate entry.

##### Question 14 of 20
1.0 Points
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).NOTE:For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.

The following data represent the number of children in a sample of 10 families from Chicago: 4, 2, 1, 1, 5, 3, 0, 1, 0, and 2.

Compute the median number of children. Place your answer, rounded to two decimal places, in the blank. For example, 3.45 would be a legitimate entry.

##### Question 15 of 20
1.0 Points
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).NOTE:For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.

The following data are the base salaries,in thousands of dollars, of 50 chief executive officers for a sample of companies doing business with the state of Connecticut. That is, the first entry in the table below corresponds to a salary of \$125,000. A copy of this data set can be found in the Excel Workbook called CEOSalaries.xls.
 125 157 113 127 201 165 145 119 148 158 148 168 117 105 136 136 125 148 108 178 179 191 225 204 104 205 197 119 209 157 209 205 221 178 247 235 217 222 224 187 265 148 165 228 239 245 152 148 115 150

Find the median of the CEO salaries, in thousands of dollars, rounded to 2 decimal places. Do not use a dollar sign. Note: \$177,760 should be recorded as 177.76.

.apus.edu/access/content/group/science-and-technology-common/Math/LenKellyObjects/MATH302%20Q1%20Pool%20Stuff/CEOSalaries.xls">CEOSalaries.xls

##### Question 16 of 20
1.0 Points
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).NOTE:For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.

A statistics professor has just given a final examination in his statistical inference course. He is particularly interested in learning how his class of 40 students performed on this exam. The scores are shown below.

77 81 74 77 79 73 80 85 86 73
83 84 81 73 75 91 76 77 95 76
90 85 92 84 81 64 75 90 78 78
82 78 86 86 82 70 76 78 72 93

What is the median score on this exam? Place your answer, rounded to two decimal places in the blank. For example, 65.78 would be a legitimate entry.

##### Question 17 of 20
1.0 Points
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).NOTE:For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.

The following data represent the number of children in a sample of 10 families from Chicago: 4, 2, 1, 1, 5, 3, 0, 1, 0, and 2.

Compute the variance of the data. Place your answer, rounded to two decimal places, in the blank. For example, 3.45 would be a legitimate entry.

##### Question 18 of 20
1.0 Points
Accepted characters: numbers, decimal point markers (period or comma), sign indicators (-), spaces (e.g., as thousands separator, 5 000), "E" or "e" (used in scientific notation).NOTE:For scientific notation, a period MUST be used as the decimal point marker.
Complex numbers should be in the form (a + bi) where "a" and "b" need to have explicitly stated values.
For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas {9i} is not.

A sample of 150 students at a State University was taken after the final business statistics exam to ask them whether they went partying the weekend before the final or spent the weekend studying, and whether they did well or poorly on the final. The following table contains the result.
 Did Well in Exam Did Poorly in Exam Studying for Exam 60 15 Went Partying 22 53

Of those in the sample who went partying the weekend before the final exam, what percentage of them did well in the exam? Place your answer in the blank, rounded to 2 decimal places. Do not use a percentage sign (%). For example, 44.44 would be a legitmate answer.

#### Part 3 of 3 -

##### Question 19 of 20
1.0 Points
If two data sets have the same range, the smallest and largest observations in both sets should be the same
 True False
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##### Question 20 of 20
1.0 Points
A histogram is skewed to the right (or positively skewed) if it has a single peak and the values of the distribution extend much further to the left of the peak than to the right of the peak.
 True False
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