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2 years ago

~giving brainly if you answer these 2 questions :)~

Mathematics

2 answers:

irga5000 [103]2 years ago

8 0

Answer:

7. 0.7 C is colder

b.-0.7 is warmer

Step-by-step explanation:

sleet_krkn [62]2 years ago

4 0

A) 3/4 = 0.75°C
0.75 > 0.70 ; the answer is 0.7°C

b) -3/4 = -0.75°C
-0.70 > -0.75 ; the answer is -3/4°C

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Compute a 99% confidence interval for the mean weight of toxic substance per gram of mold culture. State the assumption you make

kow [346]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The 99% confidence interval is $2.4309 < \mu < 4.9328$

Step-by-step explanation:

From the question we are told that

The data is 3, 2,5, 3, 2, 6, 5,4.5, 3, 3, and 4

The sample size is n = 11

Generally the sample mean is mathematically represented as

$\= x = \frac{\sum x_i}{n}$

=> $\= x = \frac{3+ 2+5+ \cdots +4 }{11}$

=> $\= x = 3.6818$

Generally the sample standard deviation is mathematically represented as

$\sigma = \sqrt{\frac{\sum [ x_i - \= x ] }{n} }$

=> $\sigma = \sqrt{\frac{[ 3 - 3.6818 ]^2 +[ 2 - 3.6818 ]^2 + \cdots + [ 4 - 3.6818 ]^2 }{11} }$

=> $\sigma = 1.3091$

Given that the confidence interval is 99% then the level of significance is mathematically represented as

$\alpha= (100 - 99) \%$

=> $\alpha= 0.01$

Given that the sample size is small we will making use of t distribution table

Generally from the t distribution table the critical value of at a degree of freedom of is

$t_{\frac{\alpha }{2} , 10 } =3.16927267$

Generally the margin of error is mathematically represented as

$E = 3.16927267 * \frac{1.3091 }{\sqrt{11} }$

$E = 1.251$

Generally 99% confidence interval is mathematically represented as

$3.6818 -1.251 < p < 3.6818 + 1.251$

=> $2.4309 < \mu < 4.9328$

8 0

3 years ago

Marking brainliest need help

victus00 [196]

Answer:

<h2>26 Shilling</h2>

Step-by-step explanation:

The amount to be paid = The new price

where;

New price = (100-x)/100 * Original price

Original price = 40.00

x = discount

<h2>Placing in formula</h2>

100-35/100 * 40.00

65/100 *40

26 shilling

<h2>Therefore the amount you will pay for the discount is 26 shilling</h2>

4 0

3 years ago

100 POINTS!!!!!!!!!!! ( I NEED FAST ANSWERS ) At a cost of $200, your club bought 175 frisbees to sell at the pep rally.

ivann1987 [24]

Answer:

it would be 675

Step-by-step explanation:

you would of earned 875 by times 175 times 2 then you subtract 200 for the cost

8 0

4 years ago

I have a stat class review and what would be the letter choice for this scatter plot?

Sonja [21]

Answer:

C. 4.5

Step-by-step explanation:

If you reference the scatter plot, you see that when x=3, y=4.5. Therefore, the answer is 4.5.

8 0

4 years ago

PLEASE HELP MY HOMEWORK IS DUE 10 MIN!!!!!!!!!!!!!!!!! Now think about changing the triangle. What happens to angle Z if the unk

kompoz [17]

Answer:

Angle Z wil change because the side length is getting longer and tbe triangle would no longer fit the conditions

4 0

3 years ago