CH 4 IVY SOFTWARE BUSINESS AND MATH
STATS PRACTICE TEST 2026 | GRADED A+ |
GUARANTEED PASS!!
.5 prob that a red car will win, prob blue/yellow will win (.25 is equal). we can
determine a mean, median and mode (cant determine mean/median in this case
because outcomes of what color car wins can't be averaged as they could in sales
levels/other # outcomes). whats the mode?
- answer-red car (most likely)
"i think there's an 80% chance of me passing this exam" is an example of
- answer-subjective prob, combo intuition, knowledge, research and judgment
10 balls in a bucket each a different color. prob that blindfolded person choosing
one marked of 10 exactly 2/7 if balls returned to bucket between drawing is
- answer-look up on appx B
n=7 r= 2 ---> .124
50 people in a room. prob that a person has brown hair is .80. of these people with
brown hair 40% have brown eyes. how many have brown hair and not brown eyes
- answer-.24
a distribution thats not a normal distribution still has a standard deviation. true or
false
- answer-true, prob distributions have standard deviation, they don't have to
necessarily be normal
ad firm 5 possible clients. partner considering offered decreased rates on media
time she's purchased. she reasons each client just as likely as not to sign on with
firm given circumstances. best tool is determine prob at least 1 client will sign
- answer-binomial, either or
bernoulli trial-2/more outcomes. true or false
- answer-false, event with ONLY 2 possible outcomes
Bernoulli Trials
- answer-events with 2 possible outcomes- success/failure
, binomial distribution
- answer-distribution of # of successes in a string of Bernoulli Trials
classical probability
- answer-if a situation can result in y possible outcomes and x of these are termed
successes, then probability of a success is x/y. list of possible outcomes must be
mutually exclusive, collectively exhausted and equally likely.
ex. card drawing- prob of drawing 1 of 4 aces in a deck of 52 4/52=1/13
conditional probabilities
- answer-prob an event occurring conditional upon another that's already known or
has already occurred. Unlike joint, events within () NOT interchangeable
cumulative probability distribution
- answer-considers possibility outcome will be less then or equal to a certain value
deck of cards, whats the prob of randomly drawing the king of clubs
- answer-1/52
frank and jim playing poker. frank needs 9 of clubs to complete flush, accidentally
see edge of one of jim's cards (a club). frank has 4 clubs in his hand. whats the
prob that the card which frank saw the 9 of clubs
- answer-1/9= .11
jack and jill on vacation. flipping coins, jill will buy jack dinner if he can flip a fair
coin 3 times in a row on heads. he will only have those three chances. whats the
prob of jack getting a free dinner
- answer-12.5%
individual success-> 1/2 or .5
3 successes, 3 trials with .5 individual prob of successes
use appx B n=3, r=3, move to .5 successes---> .125 12.5%
jack searches and finds 5 nutshells and a dried pea, tells jill he will carry suitcase if
she can predict which shell he has put pea exactly 3 out of 5 times. what the
probability that she will not carry own suitcase?
- answer-5.1%
1/5=.2
use appx B n=5 r=3 with individual prob of successes move over .2 successes --->
.05120 = 5.1%
STATS PRACTICE TEST 2026 | GRADED A+ |
GUARANTEED PASS!!
.5 prob that a red car will win, prob blue/yellow will win (.25 is equal). we can
determine a mean, median and mode (cant determine mean/median in this case
because outcomes of what color car wins can't be averaged as they could in sales
levels/other # outcomes). whats the mode?
- answer-red car (most likely)
"i think there's an 80% chance of me passing this exam" is an example of
- answer-subjective prob, combo intuition, knowledge, research and judgment
10 balls in a bucket each a different color. prob that blindfolded person choosing
one marked of 10 exactly 2/7 if balls returned to bucket between drawing is
- answer-look up on appx B
n=7 r= 2 ---> .124
50 people in a room. prob that a person has brown hair is .80. of these people with
brown hair 40% have brown eyes. how many have brown hair and not brown eyes
- answer-.24
a distribution thats not a normal distribution still has a standard deviation. true or
false
- answer-true, prob distributions have standard deviation, they don't have to
necessarily be normal
ad firm 5 possible clients. partner considering offered decreased rates on media
time she's purchased. she reasons each client just as likely as not to sign on with
firm given circumstances. best tool is determine prob at least 1 client will sign
- answer-binomial, either or
bernoulli trial-2/more outcomes. true or false
- answer-false, event with ONLY 2 possible outcomes
Bernoulli Trials
- answer-events with 2 possible outcomes- success/failure
, binomial distribution
- answer-distribution of # of successes in a string of Bernoulli Trials
classical probability
- answer-if a situation can result in y possible outcomes and x of these are termed
successes, then probability of a success is x/y. list of possible outcomes must be
mutually exclusive, collectively exhausted and equally likely.
ex. card drawing- prob of drawing 1 of 4 aces in a deck of 52 4/52=1/13
conditional probabilities
- answer-prob an event occurring conditional upon another that's already known or
has already occurred. Unlike joint, events within () NOT interchangeable
cumulative probability distribution
- answer-considers possibility outcome will be less then or equal to a certain value
deck of cards, whats the prob of randomly drawing the king of clubs
- answer-1/52
frank and jim playing poker. frank needs 9 of clubs to complete flush, accidentally
see edge of one of jim's cards (a club). frank has 4 clubs in his hand. whats the
prob that the card which frank saw the 9 of clubs
- answer-1/9= .11
jack and jill on vacation. flipping coins, jill will buy jack dinner if he can flip a fair
coin 3 times in a row on heads. he will only have those three chances. whats the
prob of jack getting a free dinner
- answer-12.5%
individual success-> 1/2 or .5
3 successes, 3 trials with .5 individual prob of successes
use appx B n=3, r=3, move to .5 successes---> .125 12.5%
jack searches and finds 5 nutshells and a dried pea, tells jill he will carry suitcase if
she can predict which shell he has put pea exactly 3 out of 5 times. what the
probability that she will not carry own suitcase?
- answer-5.1%
1/5=.2
use appx B n=5 r=3 with individual prob of successes move over .2 successes --->
.05120 = 5.1%
