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3 years ago

Each population member has a known chance of being included when a probability sampling procedure is used. true or false

Mathematics

1 answer:

ivann1987 [24]3 years ago

4 0

Answer: True

Step-by-step explanation:

In probability sampling procedure, it is always a non-zero percent chance for each population member to be included. The methods of probability sampling includes random sampling, systematic sampling and stratified sampling.

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Can someone privately help me with a math problem

Tomtit [17]

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4 years ago

Which fraction is equivalent to —(7/8)?

Nata [24]

The answer should be -14/16

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3 years ago

A gasoline tank for a certain car is designed to hold 14.0 gal of gas. Suppose that the variable x = actual capacity of a random

MariettaO [177]

Answer:

A gasoline tank for a certain car is designed to hold 14.0 gal of gas.

$\mu = 14$

$\sigma = 0.2$

a)What is the probability that a randomly selected tank will hold at most 13.7 gal?

We are supposed to find $P(x \leq 13.7)$

$z=\frac{x-\mu}{\sigma}$

$z=\frac{13.7-14}{0.2}$

$z=-1.5$

Refer the z table for p value

p value = 0.0668

So, $P(x \leq 13.7)= 0.0668$

The probability that a randomly selected tank will hold at most 13.7 gal is 0.0668

b)What is the probability that a randomly selected tank will hold between 13.4 and 14.3 gal?

We are supposed to find $P(13.4$

$z=\frac{x-\mu}{\sigma}$

$z=\frac{13.4-14}{0.2}$

$z=-3$

P(x<13.4)=P(z<-3)= 0.0013

$z=\frac{x-\mu}{\sigma}$

$z=\frac{14.3-14}{0.2}$

$z=1.5$

P(x<14.3)= 0.9332

$P(13.4$

The probability that a randomly selected tank will hold between 13.4 and 14.3 gal is 0.9319

We are supposed to find $P(x \leq 14)$

$z=\frac{x-\mu}{\sigma}$

$z=\frac{14-14}{0.2}$

$z=0$

Refer the z table for p value

p value = 0.5

So, $P(x \leq 14)= 0.5$

Two such tanks are independently selected, the probability that both hold at most 14 gal = 0.5 * 0.5 = 0.25

Hence If two such tanks are independently selected, the probability that both hold at most 14 gal is 0.25

3 0

3 years ago

Slope-intercept from of an equation for the line passes through -1,2 and Parallel to y=2x-3

Dennis_Churaev [7]

The equation of the line in slope - intercept form is $y=2 x+4$

Explanation:

The line passes through the points $(-1,2)$ and parallel to the line $y=2x-3$

Since, the line is parallel, the slope is $m=2$

The y - intercept can be determined by substituting the points $(-1,2)$ and $m=2$ in the slope - intercept formula, we get,

$y=mx+b$

$2=(2)(-1)+b$

$2=-2+b$

$4=b$

Thus, the y - intercept is $b=4$

The equation of the line in slope - intercept form can be determined using the formula $y=mx+b$

Thus, substituting $m=2$ and $b=4$ , we get,

$y=2 x+4$

Hence, the equation of the line in slope - intercept form is $y=2 x+4$

8 0

3 years ago

What is the solution to 2x + 8 > 10 ?

djyliett [7]

2x + 8 > 10
You first move + 8 to the other side, so you subtract 8
(When you see addition, you perform subtraction)
2x + 8 - 8 > 10 - 8
+ 8 and - 8 cancels out
2x > 2
Now, to isolate x, you should divide both sides by 2
(When you see multiplication, you perform division)
$\frac{2x}{2}$ > $\frac{2}{2}$
2 and 2 cancels out and we are left with
x > 1
So your final answer will be x > 1

6 0

3 years ago