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PSYCHO15rus [73]

1 year ago

13

Which of the following is a benefit to using a random sample for an observational study?

2 answers:

sashaice [31]1 year ago

8 0

Answer:

C. The results of the observational study can be generalized to the population.

Step-by-step explanation:

I chose E and it was wrong.

Pavel [41]1 year ago

6 0

Answer:

Step-by-step explanation:

Even though no answer choices are given, the main benefit of this is that by choosing a randomly from a population it allows every single individual to have the same chance of getting chosen and observed. This randomness allows for that sample group to much more accurately represent the entire population that is being observed without having to conduct additional research. Therefore, becoming extremely useful in such studies.

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Complete the steps to find all zeroes of the function f(x) = x4 − 4x3 − 4x2 + 36x − 45. This function has roots.

xxTIMURxx [149]

Steps?

A graph shows zeros to be ±3. Factoring those out leaves the quadratic
(x-2)² +1
which has complex roots 2±i.

The function has roots -3, 3, 2-i, 2+i.

7 0

2 years ago

Read 2 more answers

What is the value of b and the missing symbol in Jamilla’s inequality?

Sindrei [870]

Answer:

$b=1, \geq$

Step-by-step explanation:

we know that

The absolute value function has two solutions

Observing the graph

the solutions are

$x\geq 1$ and $x\leq -3$

First solution (case positive)

assume the symbol of the first solution and then compare the results

$\left|x+b\right|\ge2$

$(x+b)\ge2$

$x\ge2-b$

$2-b=1\\b=2-1\\ b=1$

Second solution (case negative)

$-(x+b)\ge2$

Multiply by -1 both sides

$(x+b)\leq-2$

substitute the value of b and compare the results

$(x+1)\leq-2$

$x\leq-2-1$

$x\leq-3$ -------> is correct

4 0

2 years ago

Read 2 more answers

Melinda works at a cafe. Each day that she works, she records x, the total dollar amount of her customers’ bills and then y, her

Anna35 [415]

Answer:

$26

Step-by-step explanation:

In the picture attached, the table, the plot and the line of best fit are shown. There we can see the next equation:

y = 0.177x + 25.936

where x is the total dollar amount of her customers’ bills and then y is her total daily wages.

This means that even if she serves no customers (x = 0) she will earn $26 ($25.936 rounded to the nearest dollar) for each day of work.

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2 years ago

When full, one of the pools at Sapphire Island will hold 43,000 gallons. The pool currently holds 20,000 gallons of water and is

SpyIntel [72]

Answer: Explanation and answer is attached.

Step-by-step explanation:

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2 years ago

Les is measuring the border of her bulletin board. She measures around the entire outside of the bulletin board and finds the di

vagabundo [1.1K]

Answer:

Perimeter.

Step-by-step explanation:

Lee measures around the entire outside of the bulletin board and finds the distance is 32 units.

She is measuring the border of her bulletin board.

The sum of outer covering of any object is called its perimeter. Here, 32 unit shows the perimeter of the bulletin board.

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2 years ago