Answer:
<em>8.618 divided by 0.695</em><em>=</em><em> </em><em>12.4</em>
<em>hope this helps</em><em> </em><em><</em><em>3</em>
Answer:
7x3=21
Step-by-step explanation:
pls mark Brainliest :)
Step-by-step explanation:
Solve the system via elimination (add the equations):
-10y + 9x = -9
+ (10y + 5x = -5)
-----------------------
14x = -14
x = -1
Plug in the value for 'x' into the second equation:
-10y + 5(-1) = -5
Solve for y:
-10y - 5 = -5
--> -10y = 0
--> y = 0
x = -1
y = 0
Answer:
531,441
Step-by-step explanation:
9 x 9 x 9 x 9 x 9 x 9 = 531,441
<h3>
Answer: Choice D</h3>
To calculate a point estimate, we need to know the sample size.
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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.