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4 years ago

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The sampling distribution of the sample means a. is used as a point estimator of the population mean μ. b. is an unbiased estima

tor. c. shows the distribution of all possible values of μ. d. is the probability distribution showing all possible values of the sample mean.

1 answer:

Firdavs [7]4 years ago

3 0

Answer:

d. is the probability distribution showing all possible values of the sample mean.

Step-by-step explanation:

The sampling distribution of the sample means is normal for large sample sizes and samples randomly drawn irrespective of the original distribution of the random variable.

In other words, the probability distribution showing all possible values of the sample mean is the sampling distribution of sample mean. Here sample mean is treated as a random variable and its distribution is discussed.

Hence correct option is

d. is the probability distribution showing all possible values of the sample mean.

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PLZ HELP WITH THIS QUESTION!

Bad White [126]

Answer:

D

Step-by-step explanation:

Given the quadratic

d = - 16t² + 12t ← subtract d from both sides

- 16t² + 12t - d = 0 ← in standard form

with a = - 16, b = 12, c = - d

Use the quadratic formula to solve for t

t = ( - 12 ± $\sqrt{12^2-(4(-16)(-d))}$ ) / - 32

= ( - 12 ± $\sqrt{144-64d}$ ) / - 32

= ( - 12 ± $\sqrt{16(9-4d)}$ ) / - 32

= ( - 12 ± 4 $\sqrt{9-4d}$ ) / - 32

= $\frac{-12}{-32}$ ± $\frac{4}{-32}$ $\sqrt{9-4d}$

= $\frac{3}{8}$ ± $\frac{1}{8}$ $\sqrt{9-4d}$

= $\frac{3}{8}$ ± $\frac{\sqrt{9-4d} }{8}$ → D

8 0

4 years ago

What is the standard form for y-10=3(x+5)?

zmey [24]

Answer:

$\displaystyle \boxed{-3x + y = 25}$

Step-by-step explanation:

y - 10 = 3(x + 5)

y - 10 = 3x + 15

+ 10 + 10

__________

y = 3x + 25

- 3x - 3x

________

$\displaystyle -3x + y = 25$

I am joyous to assist you anytime.

3 0

4 years ago

The probability of drawing two nickels from a bag at random without replacement is 33/95 . The probability of drawing a nickel f

Natasha_Volkova [10]

The probability that two events occur is equal to the product of the individual events happening or occurring. For this item, we let x be the probability that is unknown such that the relationship between them may be expressed as,
(3/5)(x) = 33/95
The value of x from the equation is 11/19.

7 0

4 years ago

11th grade geometry:

Aliun [14]

Answer:

<em>The perimeter is 72 units and the area is 149 square units.</em>

Step-by-step explanation:

$\triangle SBA$ has coordinates $S(15,-8),B(-2,21)$ and $A(0,0)$

Using the distance formula.........

Length of side $SB = \sqrt{(15+2)^2+(-8-21)^2}= \sqrt{17^2+(-29)^2}= \sqrt{1130}$

Length of side $BA= \sqrt{(-2)^2+(21)^2}= \sqrt{445}$

Length of side $AS =\sqrt{(15)^2+(-8)^2}=\sqrt{289}=17$

So, the perimeter of the triangle will be: $(SB+BA+AS)= \sqrt{1130}+ \sqrt{445}+17 =71.71... \approx 72$ units. <em>(Rounded to the nearest unit)</em>

The height of the triangle for the corresponding base $SB$ is 8.89 units.

<u>Formula for the Area of triangle</u>, $A= \frac{1}{2}(base\times height)$

So, the area of the $\triangle SBA$ will be: $\frac{1}{2}(\sqrt{1130}\times 8.89)= 149.42... \approx 149$ square units. <em>(Rounded to the nearest unit)</em>

3 0

4 years ago

Write down the first 5 terms of n squared + n

Alex73 [517]

Answer:

2, 6, 12, 20, 30

Step-by-step explanation:

To find the first 5 terms substitute n = 1, 2, 3, 4, 5 into the expression

n = 1 → 1² + 1 = 1 + 1 = 2

n = 2 → 2² + 2 = 4 + 2 = 6

n = 3 → 3² + 3 = 9 + 3 = 12

n = 4 → 4² + 4 = 16 + 4 = 20

n = 5 → 5² + 5 = 25 + 5 = 30

4 0

4 years ago