Ask question

Ask question

All categories

3 years ago

9

The sample mean, x , is a statistic. True or False

1 answer:

MariettaO [177]3 years ago

6 0

Answer:

True

Step-by-step explanation:

The statistic is a numerical value which describes the characteristic of a particular sample data. The sample is a set of data which represents a smaller subset randomly selected from the population or a larger dataset.

The sample mean, refers to the mean or average value of a sample data, therefore, a sample mean is a numerical characteristic of the sample dataset and it is therefore a statistic. On the other hand, numerical characteristics of a population data is called the parameter.

You might be interested in

The width of a rectangle is 9 in. shorter than its length. The area of the rectangle is 252 in². What is the length of the recta

erastovalidia [21]

Answer:

the length of the rectangle is, 21 in.

Step-by-step explanation:

Area of the rectangle(A) is given by:

$A=lw$ .....[1]

where,

l is the length of the rectangle

w is the width of the rectangle.

As per the statement:

The width of a rectangle is 9 in. shorter than its length.

⇒ $w = l-9$

It is also given that:

The area of the rectangle is 252 in².

⇒A = 252 in².

Substitute in [1] we have;

$252 = l(l-9)$

⇒ $252 = l^2-9l$

⇒ $l^2-9l -252 = 0$

Factorize this equation:

Split the middle term;

⇒ $l^2-21l+12l-252=0$

⇒ $l(l-21)+12(l-21)=0$

⇒ $(l-21)(l+12)=0$

By zero product property we have;

$l-21 =0$ and $l+12 =0$

⇒ $l = 21$ and $l = -12$

Since, length cannot be in negative

⇒ $l = 21 in.$

Therefore, the length of the rectangle is, 21 inches.

4 0

3 years ago

Sorry again what is 9,576,297 in word form

belka [17]

Answer:

Nine-million,five hundred seventy-six thousand, two hundred ninety-seven

6 0

3 years ago

Decrease £180 by 12.5%

LenKa [72]

Answer:

£ 157.5

Step-by-step explanation:

<u>12.5</u> × 180 = 22.5

100

180 - 22.5 = 157.5

I hope this helps.

4 0

3 years ago

You can pick more than one. Someone help!!

emmasim [6.3K]

Answer:

The answer is A

A 180 rotation counter clockwise around the origin :)

Step-by-step explanation:

5 0

3 years ago

Can someone help me plz

Andreyy89

Answer:

3x + 6

Step-by-step explanation:

There are 3 x's, so that would be 3x
There are 6 1's, so that would be 6
Put them together: 3x + 6

I hope this helps!

5 0

3 years ago