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bazaltina [42]
3 years ago
8

Based on a poll, 69% of internet users are more careful about personal information when using a public Wi-Fi hotspot.

Mathematics
1 answer:
Darya [45]3 years ago
8 0

Answer:

a) If we don't have enough info we can create bias in the results and that's not the idea. and since the experiment is conducted in public WIFI spot probably we have some information that will be not share with other and that probably will create bias in the results.

b) P(X \geq 1)

And we can use the complement rule and we have:

P(X \geq 1)= 1-P(X

P(X=0)=(4C0)(0.69)^0 (1-0.69)^{4-0}=0.00923

P(X \geq 1)= 1-P(X

Step-by-step explanation:

Previous concepts

The binomial distribution is a "DISCRETE probability distribution that summarizes the probability that a value will take one of two independent values under a given set of parameters. The assumptions for the binomial distribution are that there is only one outcome for each trial, each trial has the same probability of success, and each trial is mutually exclusive, or independent of each other".

Solution to the problem

Let X the random variable of interest, on this case we now that:

X \sim Binom(n=4, p=0.69)

The probability mass function for the Binomial distribution is given as:

P(X)=(nCx)(p)^x (1-p)^{n-x}

Where (nCx) means combinatory and it's given by this formula:

nCx=\frac{n!}{(n-x)! x!}

Part a

If we don't have enough info we can create bias in the results and that's not the idea. and since the experiment is conducted in public WIFI spot probably we have some information that will be not share with other and that probably will create bias in the results.

Part b

For this case we want this probability:

P(X \geq 1)

And we can use the complement rule and we have:

P(X \geq 1)= 1-P(X

P(X=0)=(4C0)(0.69)^0 (1-0.69)^{4-0}=0.00923

P(X \geq 1)= 1-P(X

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What 2 numbers divide to get 375 while multiplying to equal 38.4?
Rus_ich [418]

Answer:

<em>Well, 375 is a composite number. </em>

<em>Prime factorization: 375 = 3 x 5 x 5 x 5, which can be written 375 = 3 x (5^3) </em>

<em>The exponents in the prime factorization are 1 and 3.</em>

<em>Factors of 375: 1, 3, 5, 15, 25, 75, 125, 375. </em>

<em>Factor pairs: 375 = 1 x 375, 3 x 125, 5 x 75, or 15 x 25. </em><em>Good Luck!</em>

5 0
3 years ago
Pablo generates the function f (x) = three-halves (five-halves) Superscript x minus 1 to determine the xth number in a sequence.
kondor19780726 [428]

Answer:

f(x + 1) = Five-halves f(x) (A)

Question:

The complete question as found in brainly( ID:13525864) is stated below.

Pablo generates the function f(x) = three-halves (five-halves) Superscript x minus 1 to determine the xth number in a sequence.

Which is an equivalent representation?

f(x + 1) = Five-halvesf(x)

f(x) = Five-halvesf(x + 1)

f(x + 1) = Three-halvesf(x)

f(x) = Three-halvesf(x + 1)

Step-by-step explanation:

f(x) = (3/2)(5/2)^(x-1)

Where 3/2 = three-halves and 5/2 = (five-halves)

To determine an equivalent representation, let's assign values to x to see the outcome and compare it with the options.

f(x) = (3/2)(5/2)^(x-1)

For x = 1

f(x) = (3/2)(5/2)^(1-1) = (3/2)(5/2)^(0)

f(x) =(3/2)(1) = 3/2

For x = 2

f(x) = (3/2)(5/2)^(2-1) = (3/2)(5/2)^(1)

f(x) =(3/2)(5/2)

So from the above assigned values

f(x=1) = 3/2

f(x=2) = f(x + 1) = f(1 + 1)

f(x + 1) = (3/2)(5/2)

Since f(x) = 3/2

f(x+1) = (3/2)(5/2) = f(x) × 5/2 = 5/2f(x)

From the options, an equivalent representation: f(x + 1) = Five-halves f(x)

(A)

5 0
3 years ago
I will make up the BRAINLIEST!!!ls tell me the ......distinguish between expression and equation algebraically by providing an e
Andrej [43]
A math expression is anything where you take one or more numbers and add them, subtract them, multiply, divide, etc etc

For example, 2+3 is a math expression

To make it an algebraic expression, we replace one of the numbers with a variable. Often this is the letter x. So let's say we replace the 2 with x. That would have the expression turn into x+3. What we're saying is "some number plus 3"

Normally 2+3 = 5 which is a true equation. Replace the 2 with x and we have x+3 = 5. So we're saying "some number plus 3 is 5". You can guess and check to find that the "some number" has to be 2

--------------------------------------

In summary, the expression example was x+3 and the equation was x+3 = 5

Note: an equation is simply two expressions set equal to each other. 
3 0
3 years ago
Plzzzz helpppppppppp;(
Andrews [41]

Answer:100

Step-by-step explanation:

This is because 2 is diagonal of 5 and they are on a graph therefore being equivalent to each other let me know if this helps

4 0
3 years ago
Use elimination (adding or subtracting) to find the common solution
Leokris [45]

A) The solution (x,y) is (9,-2).

B) The solution (x,y) is (6, -1/2).

C) The solution (x,y) is (-5,2).

D) The solution (x,y) is (1, -10).

<u>Step-by-step explanation:</u>

A) x+y=7 and x+2y=5

Subtract the second equation from the first equation.

 x+y = 7

-(<u>x+2y = 5</u>)

 <u>   -y  = 2</u>

⇒ y = -2

The value of y is -2.

Substitute y= -2 in any of the equation.

⇒ x + (-2) = 7

⇒ x = 7+2

⇒ x = 9

The value of x is 9.

The solution (x,y) is (9,-2).

B) x+2y=5 and x-2y=7

Add both the equations.

x + 2y = 5

<u>x - 2y = 7 </u>

<u> 2x     = 12</u>

⇒ x = 12/2

⇒ x = 6

The value of x is 6.

Substitute x= 6 in any of the equations.

⇒ 6 + 2y = 5

⇒ 2y = 5-6

⇒ 2y = -1

⇒ y = -1/2

The value of y is -1/2.

The solution (x,y) is (6, -1/2).

C) x+4y=3 and -x+y=7

Add both the equations.

x + 4y = 3

<u>-x + y = 7 </u>

<u>    5y = 10</u>

⇒ y = 10/5

⇒ y = 2

The value of y is 2.

Substitute y=2 in any of the equations.

⇒ -x + 2 = 7

⇒ -x = 7-2

⇒ -x = 5

⇒ x = -5

The value of x is -5.

The solution (x,y) is (-5,2).

D) 5x-2y=25 and 4x-2y=24

Subtract the second equation from the first equation.

  5x - 2y = 25

- (<u>4x - 2y = 24</u>)

   <u>  x        = 1  </u>

The value of x is 1.

Substitute x=1 in any of the equations.

⇒ 5(1) - 2y = 25

⇒ 5 -2y = 25

⇒ -2y = 25-5

⇒ -2y = 20

⇒ y = -20/2

⇒ y = -10.

The value of y is -10.

The solution (x,y) is (1, -10).

<u />

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7 0
3 years ago
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