IEE 380 Exam 1 practice test questions with
correct answers
you |are |required |to |use |a |TI-89 |- |CORRECT |ANSWER✔✔-False
graph |of |F(x) |= |P(X |<= |x) |when |X |is |the |face |value |for |the |throw |of |a |fair |die? |- |CORRECT |
ANSWER✔✔-x |on |x-axis |
F(x) |on |y-axis
open |step |function |for |graph
The |entry |in |the |Z |table |(CDF |of |a |standard |normal |random |variable) |corresponding |to |a |row |
label |of |1.2 |and |a |column |label |of |.03 |is |- |CORRECT |ANSWER✔✔-P(Z |<= |1.23) |/ |phi(1.23)
If |random |variable |X |has |a/an |_______________ |number |of |values |in |a |finite |interval |of |its |
range, |X |is |continuous. |- |CORRECT |ANSWER✔✔-infinite
The |CDF |is |the |probability |that |a |random |variable, |X, |is |_______________ |to |a |specific |
number, |x. |- |CORRECT |ANSWER✔✔-less |than |or |equal |to
on |a |graph |of |the |standard |normal |variable |f(z) |is |on |the |y-axis |- |CORRECT |ANSWER✔✔-false, |
f(x)
******Let |x |(lowercase) |denote |a |specific |measured |numerical |value |of |a |random |variable. |
How |do |we |denote |this |random |variable? |That |is, |what |is |the |notation |of |the |random |
variable? |- |CORRECT |ANSWER✔✔-P(X=x)
, Open |the |text |to |section |3.6 |and |look |at |Example |3-16 |Digital |Channel. |This |example |was |part |
of |your |reading |assignment |for |the |week.
Which |of |the |following |is |the |correct |definition |of |the |random |variable |in |this |example? |- |
CORRECT |ANSWER✔✔-X |is |the |random |variable |and |it |is |the |number |of |bits |received |in |error |
out |of |the |next |four |that |are |transmitted.
******Suppose |the |pdf |of |X |is |given |as |f(x) |= |.25 |for |3 |< |x |< |8
How |many |numerical |values |can |X |be? |- |CORRECT |ANSWER✔✔-5
******How |many |values |can |a |Poisson |random |variable |have? |- |CORRECT |ANSWER✔✔-n
Let |P(X=x) |be |the |probability |that |a |random |variable |equals |a |specific |measured |numerical |
value, |x.
Let |p(x) |denote |the |probability |mass |function |of |that |random |variable, |X.
Is |this |relationship |True |or |False: |P(X=x) |= |p(x) |- |CORRECT |ANSWER✔✔-true
If |Y |is |the |face |value |for |the |throw |of |a |fair |die, |then |the |equation |((b-a+1)^2 |- |1)/12 |is |the |
______________ |of |Y. |- |CORRECT |ANSWER✔✔-variance
A |normally |distributed |random |variable |that |has |a |mean |equal |to |0 |and |a |standard |deviation |
equal |to |1 |is |called |_____________ |- |CORRECT |ANSWER✔✔-A |standard |Normal |Random |
Variable, |AKA |Z
X |is |the |face |value |for |the |throw |of |a |fair |die. |What |is |the |expected |value |of |X? |- |CORRECT |
ANSWER✔✔-3.5
correct answers
you |are |required |to |use |a |TI-89 |- |CORRECT |ANSWER✔✔-False
graph |of |F(x) |= |P(X |<= |x) |when |X |is |the |face |value |for |the |throw |of |a |fair |die? |- |CORRECT |
ANSWER✔✔-x |on |x-axis |
F(x) |on |y-axis
open |step |function |for |graph
The |entry |in |the |Z |table |(CDF |of |a |standard |normal |random |variable) |corresponding |to |a |row |
label |of |1.2 |and |a |column |label |of |.03 |is |- |CORRECT |ANSWER✔✔-P(Z |<= |1.23) |/ |phi(1.23)
If |random |variable |X |has |a/an |_______________ |number |of |values |in |a |finite |interval |of |its |
range, |X |is |continuous. |- |CORRECT |ANSWER✔✔-infinite
The |CDF |is |the |probability |that |a |random |variable, |X, |is |_______________ |to |a |specific |
number, |x. |- |CORRECT |ANSWER✔✔-less |than |or |equal |to
on |a |graph |of |the |standard |normal |variable |f(z) |is |on |the |y-axis |- |CORRECT |ANSWER✔✔-false, |
f(x)
******Let |x |(lowercase) |denote |a |specific |measured |numerical |value |of |a |random |variable. |
How |do |we |denote |this |random |variable? |That |is, |what |is |the |notation |of |the |random |
variable? |- |CORRECT |ANSWER✔✔-P(X=x)
, Open |the |text |to |section |3.6 |and |look |at |Example |3-16 |Digital |Channel. |This |example |was |part |
of |your |reading |assignment |for |the |week.
Which |of |the |following |is |the |correct |definition |of |the |random |variable |in |this |example? |- |
CORRECT |ANSWER✔✔-X |is |the |random |variable |and |it |is |the |number |of |bits |received |in |error |
out |of |the |next |four |that |are |transmitted.
******Suppose |the |pdf |of |X |is |given |as |f(x) |= |.25 |for |3 |< |x |< |8
How |many |numerical |values |can |X |be? |- |CORRECT |ANSWER✔✔-5
******How |many |values |can |a |Poisson |random |variable |have? |- |CORRECT |ANSWER✔✔-n
Let |P(X=x) |be |the |probability |that |a |random |variable |equals |a |specific |measured |numerical |
value, |x.
Let |p(x) |denote |the |probability |mass |function |of |that |random |variable, |X.
Is |this |relationship |True |or |False: |P(X=x) |= |p(x) |- |CORRECT |ANSWER✔✔-true
If |Y |is |the |face |value |for |the |throw |of |a |fair |die, |then |the |equation |((b-a+1)^2 |- |1)/12 |is |the |
______________ |of |Y. |- |CORRECT |ANSWER✔✔-variance
A |normally |distributed |random |variable |that |has |a |mean |equal |to |0 |and |a |standard |deviation |
equal |to |1 |is |called |_____________ |- |CORRECT |ANSWER✔✔-A |standard |Normal |Random |
Variable, |AKA |Z
X |is |the |face |value |for |the |throw |of |a |fair |die. |What |is |the |expected |value |of |X? |- |CORRECT |
ANSWER✔✔-3.5
