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3 years ago

If the sample size is multiplied by 4, what happens to the standard deviation of the distribution of sample means?

1 answer:

6 0

Increasing the sample size by a factor of 4 or multiplying it by 4 is equal to increasing the standard error by 1/2. Therefore, the interval will be half as varied. This also works almost for population averages as lengthy as the multiplier from the t-curve doesn't modify much when increasing the sample size.

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Evaluate each expression if a = -1 and b = 6: a + b ab

Sauron [17]

Answer:

$a + b = - 1 + 6 = 5 \\ a \times b = 6 \times ( - 1) = - 6$

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3 years ago

Read 2 more answers

What is the circumference of a circle with an area of 50.24

Pepsi [2]

Answer: C=25.12

Step-by-step explanation:

$\displaystyle\ \Large \boldsymbol{} if \ \ equal \ \pi =3,14 \ \ then \\\\\pi r^2=3,14r^2\\\\3,14r^2=50,24 \\\\ r^2=16 \\\\ r=4 \Longrightarrow C= 2\pi r=2\cdot 3,14\cdot 4=25.12 \\\\\\ Answer : C=25.12$

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2 years ago

What is the formula for the volume of a right come with base area B and height H

ss7ja [257]

Answer:

$V=\frac{1}{3}B*h$

Step-by-step explanation:

The volume of a right cone is $V=\frac{1}{3}B*h$ .

8 0

2 years ago

Antonia and Carla have the same percentage of green marbles in their bags of marbles. Antonia had 4 green marbles and 16 total m

Zarrin [17]

for the first answer is 4 because 4x4=16

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3 years ago

What is an equation of the line that passes through the points ( 3 , 1 ) and ( − 3 , − 7 ) ?

Vladimir79 [104]

Answer:

y = 4/3x - 3

Step-by-step explanation:

Use this formula to find the slope first.

(y2 - y1) / (x2 - x1)

(x2, y2) --> (-3, -7)

(x1, y1) ---> (3, 1)

Now plug in:

(-7 - 1) / (-3 - 3) = -8 / -6 = 4/3

Now find the y intercept by plugging any points to y= 4/3x + b

I will use (3, 1).

1 = 4/3(3) + b

1 = 4 + b (subtract 4 on both sides)

-3 = b

So the formula is

y = 4/3x - 3

7 0

2 years ago