C955 - Probability and Statistics Questions and Answers
1. What is a whole number?: zero or greater 0,1,2,3,...
2. What are Integers?: Same as whole numbers, but can be positive or negative.
3. What are rational numbers?: Includes all integers, plus fractions and decimals that end or repeat.
4. What is a real number?: Any number on a number line that can positive or negative, fraction, or decimal.
5. Integers are also?: Rational numbers.
6. The word "set" means: A collection of data or numbers.
7. Groups of numbers and data can be categorized as either: Discrete or Con- tinuous
8. What does discrete mean?: If the value of numbers in a set are distinct, sepa- rate, and unconnected. For example,
you cant have 3.14 of cars, you either have 3 or 4.
All positive integers are discrete numbers.
9. What does continuous mean?: If the value of numbers in a set are connected and without gaps.
10.What does interval mean?: Set of numbers between 2 specific values. Think of the numbers 1 and 2, and then
think of everything between them such as 1.2 , 1.3, and so on.
11.What does < mean?: Less than
12.What does > mean?: Greater than
13.What is the rule of thumb when it comes to the < or > sign?: The open portion of the symbol always
points to the larger quantity.
14.How is less than or greater than written?: " ( ) "
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, C955 - Probability and Statistics Questions and Answers
15.How is less than or equal to and greater than or equal to written?: " [ ] "
16.Open circle and a closed circle mean what on a number line?: Open = less than or greater than only
Closed = less than or equal to / greater than or equal to
17.If the interval is infinite, meaning rather then there being 2 values, there is only 1, what do we use as a way
to represent this?: Infinity symbol = written version
Arrow extending in a direction = number line
18.If an infinity symbol / value is used in written notation, is a parenthesis or a bracket used?: Parenthesis,
infinity has no set value.
19.Discrete sets often use which notation?: Closed brackets {}
20. If a number is divided by 0, does it equal 0?: No, a number divided by 0 doesn't automatically equal 0, but rather
its "undefined".
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1. What is a whole number?: zero or greater 0,1,2,3,...
2. What are Integers?: Same as whole numbers, but can be positive or negative.
3. What are rational numbers?: Includes all integers, plus fractions and decimals that end or repeat.
4. What is a real number?: Any number on a number line that can positive or negative, fraction, or decimal.
5. Integers are also?: Rational numbers.
6. The word "set" means: A collection of data or numbers.
7. Groups of numbers and data can be categorized as either: Discrete or Con- tinuous
8. What does discrete mean?: If the value of numbers in a set are distinct, sepa- rate, and unconnected. For example,
you cant have 3.14 of cars, you either have 3 or 4.
All positive integers are discrete numbers.
9. What does continuous mean?: If the value of numbers in a set are connected and without gaps.
10.What does interval mean?: Set of numbers between 2 specific values. Think of the numbers 1 and 2, and then
think of everything between them such as 1.2 , 1.3, and so on.
11.What does < mean?: Less than
12.What does > mean?: Greater than
13.What is the rule of thumb when it comes to the < or > sign?: The open portion of the symbol always
points to the larger quantity.
14.How is less than or greater than written?: " ( ) "
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, C955 - Probability and Statistics Questions and Answers
15.How is less than or equal to and greater than or equal to written?: " [ ] "
16.Open circle and a closed circle mean what on a number line?: Open = less than or greater than only
Closed = less than or equal to / greater than or equal to
17.If the interval is infinite, meaning rather then there being 2 values, there is only 1, what do we use as a way
to represent this?: Infinity symbol = written version
Arrow extending in a direction = number line
18.If an infinity symbol / value is used in written notation, is a parenthesis or a bracket used?: Parenthesis,
infinity has no set value.
19.Discrete sets often use which notation?: Closed brackets {}
20. If a number is divided by 0, does it equal 0?: No, a number divided by 0 doesn't automatically equal 0, but rather
its "undefined".
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