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Nikitich [7]
3 years ago
7

The normal curve shown represents the sampling distribution of a sample mean for sample size n = 25, selected at random from a p

opulation with standard deviation \sigma_xσ x ​ . Which of the following is the best estimate of the standard deviation of the population, \sigma_xσ x ​ ?
Mathematics
1 answer:
Flura [38]3 years ago
6 0

Answer:15

Step-by-step explanation:

Increments along axis are by 15 with 150 in the center.. if you’re looking at the ap classroom graph

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During swim practice Brandi swam 6 butterfly stroke laps and 8 freestyle laps. What is the ratio of freestyle laps to total laps
densk [106]

Answer:

4:7

Edit: I just saw the multiple choice options, in this case the right answer is:

<h2>8:14</h2>

but they're both equal

Step-by-step explanation:

The ratio you are looking for is

freestyle laps : (freestyle + butterfly) laps

so:

8 : (6+8)

8:14

Divide by 2 to simplify

4:7

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3 years ago
Sevilla cuts the four corners off a rectangular piece of wood as shown in the diagram.
schepotkina [342]

Answer:

64in2

Step-by-step explanation:

3+8+3=14

4+4=8

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3 0
3 years ago
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Explain how to use the distributive property to find an expression that is equivalent to 20 + 16​
IceJOKER [234]

Answer:

What you need to do is to find a multiple of 20 and 16 in other words a number that can multiply into 20 and 16. You have 2 and you have 4. So now this is how it looks like.

Either:

4(5+4) Or

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Step-by-step explanation:

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After dinner, Mirna had a second serving of her chocolate bar, eating 3
trapecia [35]

The answer is c because 8 - 5 is 3.

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valentinak56 [21]
Anywhere on the x line
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