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shusha [124]
2 years ago
5

Which statement is true?

Mathematics
2 answers:
Butoxors [25]2 years ago
6 0

Answer: A

Step-by-step explanation:

A sample statistic can never be equal to the population parameter.

aleksandrvk [35]2 years ago
4 0
<h3>Answer: Choice D</h3>

To calculate a point estimate, we need to know the sample size.

===========================================================

Explanation:

Let's go through the answer choices.

  • A) False. A sample statistic could equal to the population parameter. It won't always happen, but it might happen sometimes (in rare cases).
  • B) False. Point estimates are only defined for populations. They estimate a population parameter. For example, the sample mean xbar is a point estimate of the population mean (mu).
  • C) False. In practice, we will hardly know anything about the population. This includes the population size. The goal of statistics is to measure population parameters by using sample statistics as estimation methods.
  • D) True. We can easily calculate the sample size because it is relatively much smaller compared to the population. Plus, when selecting the sample, the sample size is often pre-determined to some set number. The sample size will help us determine things like the sample mean and the sample proportion.
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Can anyone help me with this.
Minchanka [31]

Answer:

a) third; from left most graph

b) fourth; right most graph

Step-by-step explanation:

Part a)

The graph is between the speed and time.

Nicole begin jogging faster and faster i.e. speed is increasing w.r.t time thus we have linear line in beginning.

Then she hits a comfortable speed and stayed at it i.e. speed remained constant for that time. Thus we have a straight line.

After that she gradually slows down,i.e speed is decreasing w.r.t time. Thus we have decreasing linear line.

So the graph shape is linear line with increasing slope-a constant straight line-linear line with decreasing slope

which is the third; from left most graph in option

Part b)

The graph is between Distance to campus and time.

As Dale is hiking towards campus, distance should decrease w.r.t time.

In beginning, he is hiking at constant speed towards campus thus the distance towards the campus is decreasing w.r.t time. We get a decreasing linear line.

*Note: here constant speed is not important, instead hiking towards i.e. the direction is important because of the campus distance covered

Then he sees a snake and turn and runs the other way. Thus now the distance towards the campus is increasing. And we get increasing linear line.

*Note running other way is important because of the campus distance covered

After that, he sits for a while i.e he stops and so the distance towards campus also become constant w.r.t time. we get a straight line on the graph.

So the graph shape is linear line with decreasing slope-linear line with increasing slope-a constant straight line

which is the right-most graph in option !

4 0
3 years ago
To convert a temperature for degrees Celsius to degrees Fahrenheit, the temperature in degrees Celsius is multiplied by 1.8, and
Sergio [31]

Answer:

Step-by-step explanation:

1.8C + 32 would be ur expression

when C = 25

F = 1.8C + 32

F = 1.8(25) + 32

F = 45 + 32

F = 77 degrees <====

6 0
2 years ago
Two acute triangles are similar. Which of the following must the similar triangle have?
abruzzese [7]
B is the only one that makes sense if you break them each down. An Acute doesnt have every Pair of angles congruent, the don't have to have proportional side lengths, and it can't have a right angle or it would be a right triangle.
7 0
3 years ago
Read 2 more answers
20-10 write four equivalent expressions
igor_vitrenko [27]
Here's two. I can't think of any more.


20/10
20-(-10)
5 0
3 years ago
Eight is less than 4 times another number can be shown by the inequality 8 &lt; 4n. Choose the answer that make this inequality
gladu [14]

Answer:

n < 2

Step-by-step explanation:

Let

The unknown number = n

8 < 4n

n < 8 / 4

n < 2

therefore, n must be less than 2

If n = 2

Then, 8 Will be equal to 4 times the number

7 0
3 years ago
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