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likoan [24]
3 years ago
10

A 90% confidence interval for the average weight (in pounds) of Americans was found to be (185, 210). The point estimate for thi

s confidence interval is:_______
a. 25
b. 12.5
c. 197.5
d. 1.645
Mathematics
1 answer:
Lynna [10]3 years ago
3 0

Answer:

B. 12.5

Step-by-step explanation:

We have the lowe confidence interval = 185

The upper confidence interval = 210

Mean of X = (lower confidence + upper confidence interval)/2

Mean of X = 185 + 210/2

= 197.5

The margin of error = the upper confidence interval - mean of X

= 210-197.5

= 12.5

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Which choice correctly expresses the solution set in the inequality in words?
Vera_Pavlovna [14]

Answer:

The answer to your question is letter A.

Step-by-step explanation:

Inequality                   x + 2 ≥  5

Solve the inequality, remember that inequalities and equations are solved in similar ways.

- Subtract 2 in both sides

                                   x +2 - 2 ≥ 5 - 2

- Simplify

                                          x ≥ 3      

- Remember that this sign "≥" means that x is greater or equal to a number, and this sign "≤" means that x is lower or equal to a number.

The option that satisfies our inequality is the first option.                    

                           

6 0
3 years ago
Fill in the blank to make an equivalent fraction 4/6=28_
Irina-Kira [14]
The answer is 2/3 I think
7 0
4 years ago
Read 2 more answers
Question 3
VikaD [51]

Answer:

14.50 * 1.32 = $19.14

7 0
4 years ago
Read 2 more answers
Someone please help me
zheka24 [161]

Answer:

I think 4 number is correct

3 0
2 years ago
The side lengths of a triangle are 5, 8, and 12. Is this a right triangle?
professor190 [17]

Answer:

A) No...

Step-by-step explanation:

We can check if this triangle is a right triangle by using the Pythagorean Theorem.

  • a² + b² = c²
  • where a and b are the legs of the right triangle, and c is the hypotenuse (longest side)

Using 5 for a, 8 for b, and 12 for c, let's see if this satisfies the equation:

  • 5² + 8² = 12²

Simplify.

  • 25 + 64 = 144
  • 89 = 144

We can see that 89 ≠ 144, so this leaves us with answer choices A and B. I think you meant to write < for the last + sign.

Seeing as the sum of the two lengths of the triangle is greater than the third side length, this creates a normal triangle. This cannot be the correct answer choice since this only satisfies the requirements for a triangle, but not a right triangle.

This leaves us with answer choice A.  52 + 32 ≠ 122 and 52 + 32 < 122. (I'm not sure why the squares of the side lengths are not used, but this should be the correct answer.)

6 0
3 years ago
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