Any large random sample from a group of people will be representative of the entire group.true false

Hello! I really don't understand this question. Please answer it, it is due tomorrow! Also, please answer it in the most simple

borishaifa [10]

Answer:

Just because Michelle checked out 20% of her borrowed books were fictions does not mean Michael had more books. For example, Michelle could have borrowed 100 books, which would result into her borrowing 20 fiction books while Michael could have borrowed just 1 fiction book with a 100% of his borrowed books being a fiction book.

Step-by-step explanation:

Just because Michelle checked out 20% of her borrowed books were fictions does not mean Michael had more books. For example, Michelle could have borrowed 100 books, which would result into her borrowing 20 fiction books while Michael could have borrowed just 1 fiction book with a 100% of his borrowed books being a fiction book.

In other words, percentage is just the simplied ratio of something. Percentage cannot account for the original value and its original value cannot be assumed that it is small just because the percentage is small.

6 0

3 years ago

Find the value of x . 12.5,−10,−7.5,x ; The mean is 11.5 .

fomenos

There are four values, including the unknown value x. The sum of the four values is the given value of the mean, 11.5, multiplied by four. Let S be the sum of the four values. Then we can write:
$S=11.5\times4=46$

$46=12.5 + (-10)+(-7.5)+x$
x = 46 + 5 = 51
The answer is: The value of x is 51.

4 0

4 years ago

17. A hemisphere of lead of radius 7 cm is cast into a right circular cone of height 49 cm. Find

Pavlova-9 [17]

Answer:

$r = 3.74cm$

Step-by-step explanation:

Given

Hemisphere

$Radius = 7cm$

Cone

$Height = 49m$

Required

Determine the radius of the cone

First, we calculate the volume (V1) of the hemisphere.

$V_1 = \frac{2}{3}\pi r^3$

Substitute 7 for r

$V_1 = \frac{2}{3}\pi * 7^3$

$V_1 = \frac{2}{3}\pi * 343$

$V_1 = \frac{686}{3}\pi$

Volume (V2) of a cone is:

$V_2 = \frac{1}{3}\pi r^2h$

Because the lead is cast into a cone, then they have the same volume.

So, we have:

$\frac{686}{3}\pi = \frac{1}{3}\pi r^2h$

$686 = r^2h$

Substitute 49 for h

$686 = r^2 * 49$

Divide both sides by 49

$r^2 = \frac{686}{49}$

$r^2 = 14$

$r = \sqrt{14$

$r = 3.74cm$

Hence, the radius of the cone is 3.74cm

5 0

3 years ago

Here are the records of two different sequences (A,B ) of a coin tossed eight times. A: T H H H H H H H B: H T T H T H H T If yo

ser-zykov [4K]

Answer: Sequence B is more probable than A.

Step-by-step explanation:

This two sequences are not equally probable. Sequence B is more probable than A due to the equal chances of getting head (H) and a tail (T). The probability of getting a head is equal to the probability of getting a tail which is 4/8 i.e 0.5

The sequence A is less probable because the head(H) occur more than tail (T). The probability of head occurring is almost a sure event i.e 1 which is not feasible.

6 0

4 years ago

Solve for a -90=-6a-12

Ahat [919]

Step-by-step explanation:

=>a+6a=90-12

=>7a=78

=>a=11,14

6 0

3 years ago

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