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3 years ago

Tell whether the ordered pair is a solution of the linear system

Mathematics

1 answer:

Assoli18 [71]3 years ago

6 0

Since there are no ordered pairs or linear systems in sight, it is undetermined whether the ordered pair fits it.

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Calculating the degrees of freedom, the sample variance, and the estimated standard error for evaluations using the t statistic

Yuliya22 [10]

Answer:

a) For the first part we have a sample of n =10 and we want to find the degrees of freedom, and we can use the following formula:

$df = n-1= 10-1=9$

d.9

b) $s^2 = \frac{SS}{n-1}= \frac{600}{41-1}= 15$

a.15

c) For this case we have the sample size n = 25 and the sample variance is $s^2 =400$ , the standard error can founded with this formula:

$SE = \frac{s^2}{\sqrt{n}}= \frac{400}{\sqrt{25}}= 80$

Step-by-step explanation:

Part a

For the first part we have a sample of n =10 and we want to find the degrees of freedom, and we can use the following formula:

$df = n-1= 10-1=9$

d.9

Part b

From a sample we know that n=41 and SS= 600, where SS represent the sum of quares given by:

$SS = \sum_{i=1}^n (X_i -\bar X)^2$

And the sample variance for this case can be calculated from this formula:

$s^2 = \frac{SS}{n-1}= \frac{600}{41-1}= 15$

a.15

Part c

For this case we have the sample size n = 25 and the sample variance is $s^2 =400$ , the standard error can founded with this formula:

$SE = \frac{s^2}{\sqrt{n}}= \frac{400}{\sqrt{25}}= 80$

8 0

3 years ago

Kay buys 12 pounds of apples each pound costs 3$ if she gives the cashier two 20$ bills how much change should she receive

ASHA 777 [7]

12lb of Apples

Every Pound is 3$

So, 12lb*3$

12*3 = 36$

Two 20$ bills is.... 20*2 = 40$

40$ - 36$ = 4$

So, she will receive $4.00 in change.
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7 0

3 years ago

Read 2 more answers

The fraction 1/9 produces a repeating decimal 0.1 ? true or false

Likurg_2 [28]

The answer is true. 1/9 = 0.111111......

8 0

4 years ago

Read 2 more answers

A metric ton is 1,000 kg, and a British ton is 2,000 lb. Which has the greater weight?

Margaret [11]

Answer:

A metric ton weights more because a kg is equal to about 2.204 lbs.

1000 x 2.204 = 2204 lbs > 2000 lbs

Step-by-step explanation:

Hope this helps! Have a nice day!

8 0

3 years ago

Estimate the unit rate. $2.35

vovangra [49]

If $2.35 is the unit rate, the estimated one is $2.40 if it is to the nearest tenth, $1.00 to the nearest ones. I may be wrong.

4 0

3 years ago