There can be more than one option answer it fast in two minutes

Find the slope of the line that passes through the points (-3, 2) (5, 4). Plot the points first.

levacccp [35]

Answer:

1/4

Step-by-step explanation:

grandient= y two - y one / x two - ×one

= 4-2/5--3

= 2/8= 1/4

Hope that helps

3 0

3 years ago

Assume the sample variances to be continuous measurements. Find the probability that a random sample of 25observations, from a n

konstantin123 [22]

Answer:

a) $P(4S^2 > 4*9.1) = P(\chi^2_{24} >36.4) = 0.0502$

b) $P(13.848$ Step-by-step explanation:

Previous concepts

The Chi Square distribution is the distribution of the sum of squared standard normal deviates .

For this case we assume that the sample variance is given by $S^2$ and we select a random sample of size n from a normal population with a population variance $\sigma^2$ . And we define the following statistic:

$T = \frac{(n-1) S^2}{\sigma^2}$

And the distribution for this statistic is $T \sim \chi^2_{n-1}$

For this case we know that n =25 and $\sigma^2 = 6$ so then our statistic would be given by:

$\chi^2 = \frac{(n-1)S^2}{\sigma^2}=\frac{24 S^2}{6}= 4S^2$

With 25-1 =24 degrees of freedom.

Solution to the problem

Part a

For this case we want this probability:

$P(S^2 > 9.1)$

And we can multiply the inequality by 4 on both sides and we got:

$P(4S^2 > 4*9.1) = P(\chi^2_{24} >36.4) = 0.0502$

And we can use the following excel code to find it: "=1-CHISQ.DIST(36.4,24,TRUE)"

Part b

For this case we want this probability:

$P(3.462 < S^2$

If we multiply the inequality by 4 on all the terms we got:

$P(3.462*4 < 4S^2 < 4*10.745)= P(13.848< \chi^2$ And we can find this probability like this: $P(13.848$ And we use the following code to find the answer in excel: "=CHISQ.DIST(42.98,24,TRUE)-CHISQ.DIST(13.848,24,TRUE)"

8 0

3 years ago

Helpppppppppp outtttt

irina [24]

Turn the improper fraction 2(3/4) into a mixed fraction by multiplying the coefficient or outside number "2" by the denominator "4" and then adding that result with the numerator "3":

2*4 = 8

8 + 3 = 11

Leave the denominator fixed and put you previous result as the numerator; your new fraction is 11/4

Now multiply this with 4/5:

11/4 * 4/5 = 44/20 = 22/10 = 11/5 (simplified result)

Now convert this simplified mixed fraction back into an improper fraction:

You divide the denominator "5" into the numerator "11" and put the most amount of times it goes into it out front as the coefficient;

We get that 5 goes into 11 a maximum number of times which is 2.

Then subtract the numerator "11" from "10" (5 *2) and we get 1.

Our answer is 2(1/5)

4 0

3 years ago

Read 2 more answers

I need help on this and the person who answer this correctly gets a BRANLIST(answer if you know)

quester [9]

Answer:

B

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A tree casts shadow 26 ft long. A 3 ft tall flowers casts a shadow 4 ft long. How tall is the tree?

Rufina [12.5K]

Answer:

19. 5 feets

Step-by-step explanation:

Shadow of tree = 26 feets

Height of flower = 3 feets

Shadow of flower = 4 feets

Height of sun Innthe sky:

Shadow of flower / height of flower

= 4/3 = 1.333333

Height of tree:

Shadow of tree / height of sun

26 feets / 1.33333

= 19.5 feets

Hence, height of tree = 19.5 feets

5 0

3 years ago