All categories

2 years ago

Which measure describes the standard error of the mean?

Mathematics

1 answer:

Mila [183]2 years ago

5 0

Answer: the standard deviation of the means (D)

Step-by-step explanation:

You might be interested in

Which of the following represents a function? OA X -5-1 9 8 -1 y 1 7 23 17 1 B. y NS x -4 NO 4 C. {(0,1),(3,2), (-8,3), (-7,2),

gregori [183]

Given:

The different relations in the options.

To find:

The relation which represents a function.

Solution:

A relation is called a function if there exist a unique output (y-value) for each input (x-value).

In option A, there exist two outputs y=7 and y=1 for a single input x=-1. So, this is not a function.

In option B, there exist two outputs y=-5 and y=2 for a single input x=-1. So, this is not a function.

In option C, there exist two outputs y=2 and y=4 for a single input x=3. So, this is not a function.

In option D, there exist only one value of y for each x. So, this is a function.

Therefore, the correct option is D.

5 0

3 years ago

BRAINLIST AND 30 POINTS!

marta [7]

1.b)

Fred has F cards. Bill has B cards. Tim has T cards.

B + F + T = 167

B = 5F

T = 4F - 3

5F + F + 4F - 3 = 167

10F - 3 = 167

10F = 170

F = 17

Fred has 17 cards.

B = 5F = 5(17) = 85

Bill has 85 cards.

T = 4F - 3 = 4(17) - 3 = 65

Tim has 65 cards.

2.a)

length = L

width = W

L = W + 5

perimeter = 2L + 2W = 168

2L + 2W = 168

2(W + 5) + 2W = 168

2W + 10 + 2W = 168

4W = 158

W = 39.5

L = W + 5 = 39.5 + 5 = 44.5

Length = 44.5 inches

Width = 39.5 inches

2.b)

Original rectangle:

width = W

length = 2W

New rectangle:

width = W - 1

length = 2W + 4

perimeter = 198 inches

perimeter = 2L + 2W = 198

2(2W + 4) + 2(W - 1) = 198

4W + 8 + 2W - 2 = 198

6W + 6 = 198

6W = 192

W = 32

L = 2W = 64

width = 32 inches

length = 64 inches

3.a)

Now:

Sam's age = S

John's age = 3S

In 5 years:

John's age = 3S + 5

Sam's age = S + 5

3S + 5 = 2(S + 5)

3S + 5 = 2S + 10

S = 5

Sam's age is 5.

John's age is 15.

This is all I have time for now. Post the rest of the problems in a different post, and I'll try to help later.

8 0

3 years ago

Find the area of the triangle. A. 73.6ft^2 B. 65.8 ft^2 C. 69.1 ft^2 D. 70.8 ft^2

spayn [35]

Please look at the picture for a step by step explanation - Answer choice is A

3 0

2 years ago

In the morning a farmer packed 3 pints of strawberries in 4 minutes. How many pints can he pack in an hour?

Ksju [112]

Answer:

45 pints

Step-by-step explanation:

7 0

2 years ago

What is 8 over 12 minus 4 over 12

Xelga [282]

Solutions

8 over 12 minus 4 over 12 = $\frac{8}{12}$ - $\frac{4}{12}$
Fractions have two parts. The denominator and the numerator.

The denominator in a fraction represents the total number of equal size pieces that make up a whole. For example 7/12 of a foot means one foot is broken into 12 equal sized divisions.

The numerator in a fraction represents the number of pieces selected. If the numerator is larger than the denominator, the number is larger than one. For example, 15/12 of a foot is equivalent to.

A common denominator is needed when adding, subtracting and comparing fractions because each object needs to be cut into the exact same size pieces to be able to combine, remove or compare.

$\frac{8}{12}$ and $\frac{4}{12 }$ have the same denominator.

Solve

8 - 4 = 4

The denominator stay the same.

Answer = $\frac{4}{12}$

4 0

3 years ago