torii897
  • torii897
I NEED HELP ILL FAN AND MEDAL YOU PLEAASSEEE!!!! I ONLY NEED 1.3.5
Mathematics
  • Stacey Warren - Expert brainly.com
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Vocaloid
  • Vocaloid
post your question please
torii897
  • torii897
Flip two coins 100 times, and record the results of each coin toss in a table like the one below: Result Frequency Two heads Two tails One head, One tail Answer the following questions based on the data you gathered. You must show your work to receive credit. 1. What is the theoretical probability that a coin toss results in two heads showing? 2. What is the experimental probability that a coin toss results in two heads showing? 3. What is the theoretical probability that a coin toss results in two tails showing? 4. What is the experimental probability that a coin toss results in two tails showing? 5. What is the theoretical probability that a coin toss results in one head and one tail showing? 6. What is the experimental probability that a coin toss results in one head and one tail showing? 7. Compare the theoretical probabilities to your experimental probabilities. Why might there be a difference?
torii897
  • torii897
@Vocaloid

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Vocaloid
  • Vocaloid
start by flipping the coins and filling in the table
torii897
  • torii897
I did two heads are 28 and two tails are 31 and one head and one tail is 41
torii897
  • torii897
@Vocaloid
Vocaloid
  • Vocaloid
ok, let's start with the first question
Vocaloid
  • Vocaloid
1. theoretical probability of two heads = number of 2-heads/total number of flips = ?
torii897
  • torii897
what ? im confused
Vocaloid
  • Vocaloid
how many times did you get 2-heads?
torii897
  • torii897
28
Vocaloid
  • Vocaloid
good, so 2-heads/total number of flips = ?
torii897
  • torii897
28
torii897
  • torii897
100
Vocaloid
  • Vocaloid
/ means divide
torii897
  • torii897
.28
Vocaloid
  • Vocaloid
right, small mistake on my part, this should be the answer for 2, not 1
Vocaloid
  • Vocaloid
to answer the question for 1, all we need to do is multiply (probability of heads)*(probability of heads) where the probability of heads is 1/2
torii897
  • torii897
okay that's it?
torii897
  • torii897
3?
torii897
  • torii897
@Vocaloid
Vocaloid
  • Vocaloid
for two tails, multiply (probability of tails)*probability of tails
torii897
  • torii897
.31 last one is .41 @Vocaloid
Vocaloid
  • Vocaloid
nope
Vocaloid
  • Vocaloid
for theoretical probability we ignore the data
Vocaloid
  • Vocaloid
what's the probability of getting a tails? (don't look at your data, just consider a coin by itself)
torii897
  • torii897
1/2 @Vocaloid
Vocaloid
  • Vocaloid
good, so what is (probability of tails)*(probability of tails)?
torii897
  • torii897
2/4?
torii897
  • torii897
@Vocaloid
Vocaloid
  • Vocaloid
nope... * means multiply
torii897
  • torii897
what do multiply
Vocaloid
  • Vocaloid
probability of tails = 1/2 (probability of tails)*(probability of tails) = ?
torii897
  • torii897
15.5? @Vocaloid
Vocaloid
  • Vocaloid
um... not quite...
Vocaloid
  • Vocaloid
the probability of tails is 1/2 so what is (probability of tails) times (probability of tails)?
Vocaloid
  • Vocaloid
|dw:1449526526496:dw|
Vocaloid
  • Vocaloid
still there?
torii897
  • torii897
.25? @Vocaloid
Vocaloid
  • Vocaloid
good
Vocaloid
  • Vocaloid
now for number 5 we just subtract 1 - (1/4) - (1/4)
torii897
  • torii897
that's 0 ? @Vocaloid
Vocaloid
  • Vocaloid
no it isn't... check your math again.
Vocaloid
  • Vocaloid
what is 1 - (1/4)?
torii897
  • torii897
.75 @Vocaloid

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