QRB 501 Final Exam
1) Write the following as an algebraic expression using x as the
variable: Triple a number subtracted from the number
2) Write the following as an algebraic expression using x as the
variable: Five more than the product of 7 and a number
3) Write the following as an algebraic expression using x as the
variable: Twelve less than six times a number
4) Solve: 9 + 18 3(6)
5) Solve: -3 (-2 + 4) – 5
6) Solve: (5)2 (9 17)2 (10)2
7) Identify the variable, constant, and coefficient of the expression:
10k 15
8) Identify the variable, constant, and coefficient of the expression:
3p
9) Identify the variable, constant, and coefficient of the expression:
6g + 9
10) Solve the system of equations:
3x 5y = 7
2x + 3y = 30
11) Solve the system of equations:
3x + 2y = 18
y = 3x
12) Solve the system of equations:
3x = 7 y
2y = 14 6x
13) The Manager of Engineering reported that the industrial production
index was 135. What does this production mean?
14) Which of the following is true of an index?
15) A man earned $80,000 when the Consumer
Price Index was 200. What were his earnings in terms of $2,000 if the base
period was 2000?
16) What happens as we increase the number of classes in a histogram?
17) What is the term for a number of observations in a class in a
frequency distribution?
18) Why are unequal class intervals sometimes used in a frequency
distribution?
19) What is the slope of the line: 3x y = 6
20) What is the slope of the line: 2y + 8x = 26
21) What is the slope of the line: 5y x = 10
22) Which statement is true of the y-intercept in the linear regression
model?
23) Which statement is true of a regression line that is superimposed
on the scatter plot?
24) The number of hours spent studying appears to be highly correlated
with the grade students earn in a class. Which variable would be the dependent
variable in a linear regression analysis?
25) When the interest rate is
positive, what happens to the value of money as we move from the future to the
present?
26) When interest is compounded, the
total time period is subdivided into several interest periods, for example 1
year, 3 months, 1 month. How does compound interest affect the future value of
an investment?
27) Since money has the ability to earn interest, its value increases
with time. What affects the future value of an investment more, the interest
rate or the time the investment is held?
28) What is class frequency?
29) Which of the following is NOT a guideline for a frequency
distribution?
30) What does the horizontal axis of a line chart represent?
31) What is the relationship among the mean, median, and mode in a
symmetric distribution?
32) Which measures of central tendency are not affected by extremely
low or extremely high values?
33) What is a disadvantage of using range as a measure of dispersion?
34) Which of the following is true regarding the normal distribution?
35) What percentage of observations of a normal distribution is
represented by the mean plus or minus 1.96 standard deviations?
36) Which of the following is true in a normal distribution?QRB 501 Final Exam1) Write the following as an algebraic expression using x as the
variable: Triple a number subtracted from the number2) Write the following as an algebraic expression using x as the
variable: Five more than the product of 7 and a number3) Write the following as an algebraic expression using x as the
variable: Twelve less than six times a number4) Solve: 9 + 18 3(6)5) Solve: -3 (-2 + 4) – 56) Solve: (5)2 (9 17)2 (10)27) Identify the variable, constant, and coefficient of the expression:
10k 158) Identify the variable, constant, and coefficient of the expression:
3p9) Identify the variable, constant, and coefficient of the expression:
6g + 910) Solve the system of equations:
3x 5y = 7
2x + 3y = 3011) Solve the system of equations:
3x + 2y = 18
y = 3×12) Solve the system of equations:
3x = 7 y
2y = 14 6×13) The Manager of Engineering reported that the industrial production
index was 135. What does this production mean?14) Which of the following is true of an index?15) A man earned $80,000 when the Consumer
Price Index was 200. What were his earnings in terms of $2,000 if the base
period was 2000?16) What happens as we increase the number of classes in a histogram?17) What is the term for a number of observations in a class in a
frequency distribution?18) Why are unequal class intervals sometimes used in a frequency
distribution?19) What is the slope of the line: 3x y = 620) What is the slope of the line: 2y + 8x = 2621) What is the slope of the line: 5y x = 1022) Which statement is true of the y-intercept in the linear regression
model?23) Which statement is true of a regression line that is superimposed
on the scatter plot?24) The number of hours spent studying appears to be highly correlated
with the grade students earn in a class. Which variable would be the dependent
variable in a linear regression analysis?25) When the interest rate is
positive, what happens to the value of money as we move from the future to the
present?26) When interest is compounded, the
total time period is subdivided into several interest periods, for example 1
year, 3 months, 1 month. How does compound interest affect the future value of
an investment?27) Since money has the ability to earn interest, its value increases
with time. What affects the future value of an investment more, the interest
rate or the time the investment is held?28) What is class frequency?29) Which of the following is NOT a guideline for a frequency
distribution?30) What does the horizontal axis of a line chart represent?31) What is the relationship among the mean, median, and mode in a
symmetric distribution?32) Which measures of central tendency are not affected by extremely
low or extremely high values?33) What is a disadvantage of using range as a measure of dispersion?34) Which of the following is true regarding the normal distribution?35) What percentage of observations of a normal distribution is
represented by the mean plus or minus 1.96 standard deviations?36) Which of the following is true in a normal distribution?
