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kvv77 [185]
2 years ago
10

The professor samples her class by selecting 5 females and 7 males. this type of sampling is called?

SAT
1 answer:
Serhud [2]2 years ago
4 0

Answer:

Random selection

Explanation:

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In interval estimation, the t distribution is applicable only when
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Answer: the population has a mean of less than 30

Explanation:

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3 years ago
In the context of alabama in the 1900s, the umwa was culturally and historically significant because it supported the civil righ
Artist 52 [7]

In the context of Alabama in the 1900s, the umwa was culturally and historically significant because it supported the civil rights movement in supported coal mining companies.

<h3>The umwa</h3>

The United Mine Workers of America (UMW or UMWA) is a North American labor union best known for representing coal miners. Today, the Union also represents health care workers, truck drivers, manufacturing workers and public employees in the United States and Canad.

With this information, we can conclude that in the context of Alabama in the 1900s, the umwa was culturally and historically significant because it supported the civil rights movement in supported coal mining companies.

Learn more about umwa in brainly.com/question/9966627

8 0
2 years ago
At an ocean depth of 20 meters, a buoy bobs up and then down 2 meters from the ocean's depth. Four seconds pass from the time th
stiv31 [10]

The first and second coordinate points of the sine graph are;

(0, 20) and (2, 22)

<h3>Sine Graph expression</h3>

The general formula we will use to plot the graph is;

y = [Asin (2πx/t)] + ∅      (Note that sin is in radians)

where;

A is amplitude

t is period

∅ is phase shift

We are told that the buoy bobs up and then down 2 meters from the ocean's depth. This means that;

Amplitude; A = 2

Now, Four seconds pass from the time the buoy is at its highest point to when it is at its lowest point. Thus;

Period = 2 * 4 = 8 seconds

Assume at x = 0, the buoy is at normal ocean depth. Thus;

Phase shift; ∅ = 20

Thus, we have;

y = [2sin((2πx/8)] + 20  

At x = 0, we have;

y = [2sin((2π*0/8)] + 20  

y = 0 + 20

y = 20

Thus, first point is; (0, 20)

Since the second point must be a maximum or minimum value on the graph closest to the first point, then we put 2 for x to get the coordinate of the second point;

y = [2sin((2π*2/8)] + 20  

y = [2sin((2π*2/8)] + 20  

y = [2sin(π/2)] + 20  

In radians, sin(π/2) = 1. Thus;

y = (2 * 1) + 20

y = 22

Second point is (2, 22)

Using the first and second point coordinates, we will use sine tool to graph the function as attached below.

Read more about sine graph at; brainly.com/question/18055768

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