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3 years ago

I am really lost in this statistics problem and I would truly appreciate it if someone can help me with it

Mathematics

1 answer:

lutik1710 [3]3 years ago

4 0

Answer:

Statistics is the science concerned with developing and studying methods for collecting, analyzing, interpreting and presenting empirical data. ... Any measurement or data collection effort is subject to a number of sources of variation.

Step-by-step explanation:

soo yeah

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10. A random sample of 10 fibers is taken from a collection of 92 fibers that consists of 43 fibers of polymer A, 17 fibers of p

vazorg [7]

Answer:

0.1150 = 11.50% probability that the sample does not contain any fibers of polymer B

Step-by-step explanation:

Hypergeometric distribution:

The probability of x sucesses is given by the following formula:

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

In which:

x is the number of sucesses.

N is the size of the population.

n is the size of the sample.

k is the total number of desired outcomes.

Combinations formula:

$C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

In this question:

Fibers are chosen without replacement, which means that we use the hypergeometric distribution.

92 fibers means that $N = 92$

Sample of 10 means that $n = 10$

No polymeter B which means that $x = 0$

17 fibers of polymeter B which means that $k = 17$

a. What is the probability that the sample does not contain any fibers of polymer B

This is P(X = 0).

$P(X = x) = h(x,N,n,k) = \frac{C_{k,x}*C_{N-k,n-x}}{C_{N,n}}$

$P(X = 0) = h(0,92,10,17) = \frac{C_{17,0}*C_{75,10}}{C_{92,10}} = 0.1150$

0.1150 = 11.50% probability that the sample does not contain any fibers of polymer B

4 0

3 years ago

What is another way to find the total cost. of shoes for $57 with a sales tax of 2%?

Alekssandra [29.7K]

Hey there!

Make the 2% to a decimal which is .02 and multiply it by 57 to find the sales tax

.02*57= 11.4
So 11.4 is the sales tax
So add 11.4 to 57 and you get

$68.40 is the total cost

Hope this helps!

3 0

3 years ago

1600, 400, 100, 25, ...<br> O Arithmetic <br> O Geometric<br> O Neither

jeyben [28]

This is a GEOMETRIC sequence as each number is being multiplied by 1/4

6 0

3 years ago

Can someone please check this (#4) for me?

IrinaVladis [17]

Answer:

What you are doing wrong is that you are using the formula to find the area of the entire circle rather than using the formula to find a sector of a circle. The two cases uses 2 different kind sentences of formulas.

3 0

3 years ago

A city has 3 new houses for every 7 old houses. If there are 24 new houses in the city, how many old houses are there?

kramer

Answer:

B. 56

Step-by-step explanation:

24 / 3 = 8

8 * 7 = 56

Hope this helps! ;)

8 0

3 years ago