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Llana [10]
3 years ago
11

Why should you generally expect some error when estimating a parameter? (for example, a population? mean) by a statistic? (for e

xample, a sample? mean)? what is this kind of error? called?
Mathematics
1 answer:
nexus9112 [7]3 years ago
8 0

This is called as sampling error or sampling variability. Sampling error is the variability that happens because the value of a sample statistic varies from sample to sample. Sampling error is acquired when a population is estimated from a subset, or sample.

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What is the slope of the line with the equation y +2 = -3(x – 7)?
Citrus2011 [14]

Answer:

A.m = -3

Step-by-step explanation:

This equation is written in point slope form

y-y1 = m(x-x1)

y +2 = -3(x – 7)

y - -2 = -3(x – 7)

The slope is -3 and the point is (7, -2)

5 0
2 years ago
A player kicks a soccer ball from a height of 2 feet. The ball reaches A maximum height of 20 feet after traveling 40 feet horiz
Artyom0805 [142]

The height is 9.875 feet from which the goalkeeper catches the ball.

The player kicks soccer from a height of 2 feet

x = 0 and y = 2

Maximum height of 20 feet after traveling 40 feet

x = 40, y = 20

So let y = a(x - 40)² + 20  ( the path of parabola)

Since x = 0 , y = 2

So, 2 = a(0 - 40)² + 20

2 = 1600a + 20

-18 = 1600a

a = - 9/800

Thus, y = -9/800(x - 40)² + 20

Since the soccer is caught by the goalkeeper 70 feet from where it was kicked

x = 70

So at this time,

y = -9/800 ( 70 - 40)² + 20

  = -9/800 × 900 + 20

  = - 81/8 + 20

  = 79/ 8

  = 9.875 feet

Therefore the height at which the goalkeeper catches the ball is 9.875 feet.

To know more about the height refer to the link given below:

brainly.com/question/27030273

#SPJ1

7 0
1 year ago
Let f be defined as shown on the graph. Which statement is true?
satela [25.4K]
The inverse of f does NOT exist. The reason why is because the function fails the horizontal line test. Recall that the horizontal line test is a test where you try to see if you can pass a single horizontal line through more than one point on the function curve. If you can get the horizontal line to pass through more than one point, then it fails the test. It's very similar to the vertical line test.
4 0
3 years ago
4. Look at the figure below.<br><br> Are triangles ABC and DEF congruent? Explain why or why not.
Debora [2.8K]

Answer:

Yes

Step-by-step explanation:

You see that angle D and angle A are congruent, and you see that angle C and angle F are congruent. In addition, line AC is congruent to DF. This means that yes, those triangles are congruent because of the ASA postulate.

3 0
3 years ago
2x+7y=3<br><br>x=−4y<br><br>​what is x and y
natima [27]

Answer:

x=-4

y=-3

Step-by-step explanation:

2(-4y)+7y=3

-8y+7y=3

y=-3

3 0
2 years ago
Read 2 more answers
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