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4 years ago

Help with all? uhh need work and everything heh.

Mathematics

1 answer:

Anna11 [10]4 years ago

3 0

What grade and how many pages do you have?

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The probability of being a universal donor is 6% (O-negative-blood type). Suppose that 6 people come to a blood drive.' a) What

Tcecarenko [31]

Answer:

$Mean = 0.36$

$SD = 0.5817$

$P(x=3) = 0.003588$

Step-by-step explanation:

Given

Let

A = Event of being a universal donor.

So:

$P(A) = 0.06$

$n = 6$

Solving (a): Mean and Standard deviation.

The mean is:

$Mean = np$

$Mean = 6 * 0.06$

$Mean = 0.36$

The standard deviation is:

$SD = \sqrt{np(1-p)}$

$SD = \sqrt{6*0.06*(1-0.06)}$

$SD = \sqrt{0.3384}$

$SD = 0.5817$

Solving (b): P(x = 3)

The event is a binomial event an dthe probability is calculated as:

$P(x) = ^nC_x * p^x * (1-p)^{n-x}$

So, we have:

$P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^{6-3}$

$P(x=3) = ^6C_3 * 0.06^3 * (1-0.06)^3$

$P(x=3) = 20 * 0.06^3 * (1-0.06)^3$

$P(x=3) = 0.003588$

7 0

3 years ago

Consider the line y equals 2 over 5 x plus 4.

crimeas [40]

the parallel linear equation is:

y = (2/5)*x - 3

<h3></h3><h3>How to find the parallel line?</h3>

Two lines are parallel if the lines have the same slope but different y-intercept.

Here we know the line equation:

y = (2/5)*x + 4

Then a parallel line is of the form:

y = (2/5)*x + c

Where c is different than 4.

We want this line to pass through (5, -1), then:

-1 = (2/5)*5 + c

-1 = 2 + c

-1 - 2 = -3 = c

Then the parallel linear equation is:

y = (2/5)*x - 3

If you want to learn about linear equations:

brainly.com/question/1884491

#SPJ1

3 0

2 years ago

Find the slope and the equation for the line passing through the points: (1,0) and (-1,1)

bazaltina [42]

The answer would be 1/-2

6 0

3 years ago

An experiment is set up to study the weights of 35 mice after they are injected with a drug. The population mean is 23.50 grams

IgorC [24]

Answer:

The standard error of the sample mean is 0.57

Step-by-step explanation:

we know that

The Standard Error Formula is given by the formula

$SE = \frac{s}{ \sqrt{n} }}$

where:

SE = standard error

s = standard deviation

n = the sample size

In this problem we have

$s=3.40\ g\\n=35$

substitute in the formula

$SE = \frac{3.40}{ \sqrt{35}}}$

$SE=0.57$

6 0

3 years ago

Which value is equal to -18 divided by -9?

trapecia [35]

Answer:

$\huge \boxed{ \boxed{2}}$

Step-by-step explanation:

<h3>to understand this</h3><h3>you need to know about:</h3>

PEMDAS
integer

<h3>tips and formulas:</h3>

$\frac{ - a}{ - b} = c$

<h3>let's solve:</h3>

$\sf step - 1 : define$

$\sf\frac{ - 18}{ - 9}$

$\sf step - 2 : solve$

$\sf simplify \: divisio n : \\ \frac{ - 18}{ -9 } \\ = 2$

6 0

3 years ago