exams

Question 1

What is the converse of p => q?

Answer 1

q => p

Question 2

What is the inverse of p => q?

Answer 2

‘p => ‘q (if not p, then not q)

Question 3

What is the contrapositive of p => q?

Answer 3

‘q => ‘p (if not q, then not p) (flipped and negative)

Question 4

What is the meaning of p ^ q?

Answer 4

p and q, in a truth table both p and q must be true in order for p ^ q to be true as well. ‘p and q’

Question 5

What is the meaning of p v q?

Answer 5

p or q can be true with only one truth value, can only be false with two false truth values ‘p or q’

Question 6

What is the meaning of p ⊻ q?

Answer 6

can only be true with one truth value, ‘p or q but not both’

Question 7

What is a tautology?

Answer 7

all values in table are true

Question 8

What is a logical contradiction?

Answer 8

all values in truth table are false

Question 9

What is a logical equivalence?

Answer 9

the two tables have the same truth values

Question 10

How do you calculate normal distribution between two boundaries?
Ex.: Find the probability that a value is between 65 and 80, inclusive.

Answer 10

[2ND], [VARS], normalcdf

enter values for [upper bound], [lower bound], [mean], and [standard deviation].

Question 11

How do you calculate normal distribution upwards of one boundary?
Ex.: Find the probability that a value is greater than or equal to 75.

Answer 11

[2ND], [VARS], normalcdf

enter values for [upper bound: 75], [infinity or 10^99], [mean], and [standard deviation].

Question 12

How do you calculate normal distribution downwards of one boundary?
Ex.: Find the probability that a value is less than 62.

Answer 12

[2ND], [VARS], normalcdf

enter values for [upper bound: 62], [lower bound: -10^99 (negative infinity)], [mean], and [standard deviation].

Question 13

How do you find the [xth] percentile for a distribution?

Ex.: the 90th percentile

Answer 13

[2ND], [VARS], invNorm

enter values for [percentile: 0.90], [mean], and [standard deviation]. The calculated number is an x-value.

Question 14

What is an arithmetic sequence?

Answer 14

a patterned series of numbers which adds or subtracts a set number each time

Question 15

What is a geometric sequence?

Answer 15

a patterned series of numbers which multiplies or divides by a set number each time

Question 16

What is a common ratio in sequences and series?

Answer 16

the increase or decrease of a sequence each term

Question 17

In TVM Solver, what is N?

Answer 17

of time periods

Question 18

In TVM Solver, what is I%?

Answer 18

interest rate/year

Question 19

In TVM Solver, what is PV?

Answer 19

present value of investment

Question 20

In TVM Solver, what is PMT?

Answer 20

payment each time period

Question 21

In TVM Solver, what is FV?

Answer 21

future value, press [SOLVE] for value

Question 22

In TVM Solver, what is P/Y?

Answer 22

of payments per year

Question 23

In TVM Solver, what is C/Y?

Answer 23

of compounding periods per year, the same value as P/Y

Question 24

How do you make a box and whisker plot?

Answer 24

[STAT] [EDIT]
enter values
turn on box plot under [2ND] [Y=]
choose first plot
[TRACE] gives min, Q1, median, Q3, and X

Question 25

How do you perform a X^2 test?

Answer 25

[2ND] [MATRX] [EDIT]
enter values
[STAT] [TESTS] [C]