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Math Help - Bating probabilities.....someone who knows statistics please help me

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    Bating probabilities.....someone who knows statistics please help me

    when i played baseball (from age 8 through high school), i had an overall batting average of .325 ( meaning my probability of getting a hit in any given at bat was 0.325

    a) If i were to have 4 at bats in a particular game , what is the probability that i had at least 1 hit?

    b) If i were to have 300 at bats in one season, what is the probability that i had at least 120 hits ( giving me a .400 average, which is pretty good, for those of you that don't know)?
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by hello there View Post
    when i played baseball (from age 8 through high school), i had an overall batting average of .325 ( meaning my probability of getting a hit in any given at bat was 0.325

    a) If i were to have 4 at bats in a particular game , what is the probability that i had at least 1 hit?
    Ok, so i'm not that good with probability, but i think i know how to do the first question. we will use Bernoulli Trials

    We will use P(k) to denote the probability of k successes. that is, P(0) means the probability of you getting no hits, P(1) is the probability of you getting 1 hit, etc

    We want the probability of you getting AT LEAST one hit, which means you got one or more (up to four), so that means we want the probability of:
    P(1) + P(2) + P(3) + P(4) (do you know why?)

    but, we can make this simpler, it will be the probability of:

    1 - P(0) (do you know why?)

    so let's do it. see the attached image below.
    Attached Thumbnails Attached Thumbnails Bating probabilities.....someone who knows statistics please help me-probability.gif  
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by hello there View Post

    b) If i were to have 300 at bats in one season, what is the probability that i had at least 120 hits ( giving me a .400 average, which is pretty good, for those of you that don't know)?
    Here's my attempt at part (b)
    Attached Thumbnails Attached Thumbnails Bating probabilities.....someone who knows statistics please help me-probability2.gif  
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