Please help with this

Mathematics

1 answer:

Sloan [31]3 years ago

6 0

Answer:

quick question for you to change in what way do you want to be a good day at work and I don't know how to share with you and I don't

You might be interested in

The perimeter of the rectangle is 28 units. <br> What is the value of w?

Georgia [21]

Answer:

5 units

Step-by-step explanation:

im pretty sure i did the calculations right

7 0

2 years ago

Which has a sum = to 2 3/8 +3 4/8?

monitta

B) 19/8 + 28/8

have a great day!

3 0

3 years ago

If you form a triangle from two given angle measures and the length of the included side, will you always get one triangle or wi

Ann [662]

Answer:

It is not always possible to construct a triangle from a given side length and two angles. If the two given angles add to more than 180°, the sides of the triangle will diverge and never meet.

Step-by-step explanation:

7 0

3 years ago

One strange phenomenon that sometimes occurs at U.S. airport security gates is that an otherwise law-abiding passenger is caught

valentinak56 [21]

Answer:

c. 0.16

Step-by-step explanation:

For each passenger there are only two possible outcomes. Either they are caught with a gun, or they are not. The probability of a passenger being caught with a gun is independent from other passengers. So we use the binomial probability distribution to solve this question.

However, we are working with samples that are considerably big. So i am going to aproximate this binomial distribution to the normal.

Binomial probability distribution

Probability of exactly x sucesses on n repeated trials, with p probability.

Can be approximated to a normal distribution, using the expected value and the standard deviation.

The expected value of the binomial distribution is:

$E(X) = np$

The standard deviation of the binomial distribution is:

$\sqrt{V(X)} = \sqrt{np(1-p)}$

Normal probability distribution

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

When we are approximating a binomial distribution to a normal one, we have that $\mu = E(X)$ , $\sigma = \sqrt{V(X)}$ .