4 years ago

A

Mathematics

1 answer:

harkovskaia [24]4 years ago

7 0

Answer:

Step-by-step explanation:

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Ardem collected data from a class survey. He then randomly selected samples of five responses to generate four samples.

scoundrel [369]

Solution: The sample mean of sample 1 is:

$\bar{x}=\frac{4+5+2+4+3}{5}= \frac{18}{5}=3.6$

The sample mean of sample 2 is:

$\bar{x}=\frac{2+2+6+5+7}{5}= \frac{22}{5}=4.4$

The sample mean of sample 3 is:

$\bar{x}=\frac{4+6+3+4+1}{5}= \frac{18}{5}=3.6$

The sample mean of sample 4 is:

$\bar{x}=\frac{5+2+4+3+6}{5}= \frac{20}{5}=4$

The minimum sample mean of the four sample means is 3.6 and maximum sample mean of the four sample means is 4.4.

Therefore, using his four samples, between 3.6 and 4.4 will Ardem's actual population mean lie.

Hence the option 3.6 and 4.4 is correct

6 0

4 years ago

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Does there appear to be a proportional relationship between the radius and circumference of a circle? Explain or show your reaso

elena-14-01-66 [18.8K]

Answer:

thx

Step-by-step explanation:

3 0

3 years ago

10. Calculate 18% of 75 to one decimal place.

Anarel [89]

First write 18% as a decimal by moving the decimal point two places to the left to get .18.

The word "of" means multiply, so we have (.18)(75) which is 13.5.

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3 years ago

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Any help please thanks

vekshin1

Answer:

n=54

Step-by-step explanation:

Since this is a proportion problem, you have cross mulitply.

7n=9x42

7n=378

n=54

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3 years ago

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20. There were sold 200 books and magazines. Ono book costs $15 and oach magazino costs

WARRIOR [948]

The answer is 75
how do i know?
1500 divided by 20

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3 years ago

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