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rodikova [14]
3 years ago
7

Given that x is a hypergeometric random variable with Nequals10​, nequals4​, and requals6​, complete parts a through d. a. Compu

te ​P(xequals1​). ​P(xequals1​)equals . 114 ​(Round to three decimal places as​ needed.) by. Compute ​P(x equals 0​). ​P(xequals 0​)equals . 005 ​(Rounded to three decimal places as​ needed.) c. Compute ​P(xequals3​). ​P(xequals3​)equals . 381 ​(Round to three decimal places as​ needed.) d. Compute ​P(xgreater than or equals5​). ​P(xgreater than or equals5​)equals nothing ​(Round to three decimal places as​ needed.)
Mathematics
1 answer:
sergey [27]3 years ago
6 0

Answer:

a. 0.114

b. 0.005

c. 0.381

d. 0.00

Step-by-step explanation:

If x follows a hypergeometric distribution, the probability that x is equal to k is calculated as:

P(x=k)=\frac{(rCk)*((N-r)C(n-k))}{NCn}

Where k≤r and n-k≤N-r, Additionally:

aCb=\frac{a!}{b!(a-b)!}

So, replacing N by 10, n by 4 and r by 6, we get:

P(x=k)=\frac{6Ck*((10-6)C(4-k))}{10C4}=\frac{6Ck*(4C(4-k))}{10C4}

Then, the probability that x is equal to 1, P(x=1) is:

P(x=1)=\frac{6C1*4C3}{10C4}=0.114

The probability that x is equal to 0, P(x=0) is:

P(x=0)=\frac{6C0*4C4}{10C4}=0.005

The probability that x is equal to 3, P(x=3) is:

P(x=3)=\frac{6C3*4C1}{10C4}=0.381

Finally, in this case, x can take values from 0 to 4, so the probability that x is greater or equals to 5 is zero.

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Step 1

<u>Find the equation in function notation</u>

Let

h-------> the number of hours

y-------> the function for the walker fee in dollars

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y=6+30h

in this linear equation

the independent variable is the variable h

the dependent variable is the variable y

<u>Convert to function notation</u>

Let

f(h)=y

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Step 2

Find how much does the dog walker charge for a 45 minute walk

Convert the time in hours

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<u>Statements</u>

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<u>The dependent variable is the number of hours true or false</u>

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Step 4

<u>The function for the walker fee is f(h)= 30h+6 true or false</u>

The statement is True --------> see the Step 1

Step 5

<u>The dog walker charges $22.5 for a 45 min walk true or false</u>

The statement is False

Because the dog walker charges for a 45 minute walk \$28.5

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</span>
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