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3 years ago

Please help will give brainliest

Mathematics

1 answer:

Ivanshal [37]3 years ago

4 0

Answer:

$\frac{1}{2}$

Step-by-step explanation:

Honestly not sure what all the numbers you put down were (numbers for the graph?), but here is how to find the slope :)

First, find two "exact" points!

I am going to use (0, 1) and (2, 2)

We then go to our first point, (0, 1), and count how many points up it is until we are on the same x-axis of our y. This is 1. We then do the same thing for the y-axis. This is 2. It is rise over run, so the answer is $\frac{1}{2}$

(I hope this helps, have a nice day!)

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The cycle time for trucks hauling concrete to a highway construction site is uniformly distributed over the interval 40 to 75 mi

jeka57 [31]

Answer:

0.8333 = 83.33% probability that the cycle time exceeds 50 minutes if it is known that the cycle time exceeds 45 minutes

Step-by-step explanation:

A distribution is called uniform if each outcome has the same probability of happening.

The uniform distributon has two bounds, a and b, and the probability of finding a value higher than x is given by:

$P(X > x) = \frac{b - x}{b - a}$

Uniformly distributed over the interval 40 to 75 minutes.

This means that $a = 40, b = 75$

It is known that the cycle time exceeds 45 minutes

This means that we can use $a = 45$

What is the probability that the cycle time exceeds 50 minutes?

$P(X > 50) = \frac{75 - 50}{75 - 45} = 0.8333$

0.8333 = 83.33% probability that the cycle time exceeds 50 minutes if it is known that the cycle time exceeds 45 minutes

8 0

3 years ago

Average of 766 and 878

Greeley [361]

(766+878)÷2=1644÷2=822

7 0

4 years ago

-w + 4(w+3) = -12 Please help

Ivahew [28]

Let's solve your equation step-by-step.−w+4(w+3)=−12Step 1: Simplify both sides of the equation.−w+4(w+3)=−12Simplify: (Show steps)3w+12=−12Step 2: Subtract 12 from both sides.3w+12−12=−12−123w=−24Step 3: Divide both sides by 3.3w3=−243w=−8Answer:w=−8

4 0

3 years ago

Read 2 more answers

Item 1 Find 11/12+(−7/12). Write your answer as a fraction in simplest form.

QveST [7]

Answer:

1/3

Step-by-step explanation:

I think not sure.

7 0

3 years ago

Do one of the following, as appropriate. (a) Find the critical value z Subscript alpha divided by 2, (b) find the critical v

aliya0001 [1]

Answer:

$t=\pm 2.95$

Step-by-step explanation:

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The t distribution or Student’s t-distribution is a "probability distribution that is used to estimate population parameters when the sample size is small (n<30) or when the population variance is unknown".

The shape of the t distribution is determined by its degrees of freedom and when the degrees of freedom increase the t distirbution becomes a normal distribution approximately.

Data given

Confidence =0.99 or 99%

$\alpha=1-0.99=0.01$ represent the significance level

n =16 represent the sample size

We don't know the population deviation $\sigma$

Solution for the problem

For this case since we don't know the population deviation and our sample size is <30 we can't use the normal distribution. We neeed to use on this case the t distribution, first we need to calculate the degrees of freedom given by:

$df=n-1=16-1=15$

We know that $\alpha=0.01$ so then $\alpha/2=0.005$ and we can find on the t distribution with 15 degrees of freedom a value that accumulates 0.005 of the area on the left tail. We can use the following excel code to find it:

"=T.INV(0.005;15)" and we got $t_{\alpha/2}=-2.95$ on this case since the distribution is symmetric we know that the other critical value is $t_{\alpha/2}=2.95$

8 0

4 years ago