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4 years ago

You MIGHT have the author been addressing when writing this?

Mathematics

1 answer:

solmaris [256]4 years ago

6 0

Answer:

its b lol

Step-by-step explanation:

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Please guys halp me

Mars2501 [29]

France, Britain, Israel

8 0

4 years ago

Read 2 more answers

You do a study of hypnotherapy to determine how effective it is in increasing the number of hours of sleep subjects get each nig

brilliants [131]

Answer:

Confidence interval

$8.98-2.2\frac{1.29}{\sqrt{12}}=8.16$

$8.98+2.2\frac{1.29}{\sqrt{12}}=9.80$

And the margin of error would be:

$ME=2.2\frac{1.29}{\sqrt{12}}=0.819$

Step-by-step explanation:

For this case we have the followig dataset:

DATA: 8.2; 9.1; 7.7; 8.6; 6.9; 11.2; 10.1; 9.9; 8.9; 9.2; 7.5; 10.5

We can calculate the mean and the deviation with the following formulas:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

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

And replacing we got:

$\bar X= 8.98[/tex[tex]s = 1.29$

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are given by:

$df=n-1=12-1=11$

The Confidence level is 0.95 or 95%, the value of significance is $\alpha=0.05$ and $\alpha/2 =0.025$ , and the critical value would be $t_{\alpha/2}=2.20$

Repplacing the info we got:

$8.98-2.2\frac{1.29}{\sqrt{12}}=8.16$

$8.98+2.2\frac{1.29}{\sqrt{12}}=9.80$ And the margin of error would be:

$ME=2.2\frac{1.29}{\sqrt{12}}=0.819$

7 0

3 years ago

Convert 375 minutes to hours?

Makovka662 [10]

Answer:

6.25 hours

Step-by-step explanation:

As we know that,

1 hour = 60 minutes

⇒ $1 \ minute = \frac{1}{60} \ hour$

⇒ $375 \ minutes =375\times \frac{1}{60} \ hours$

⇒ 375 mintes = 6.25 hours

Thus, 375 mintes = 6.25 hours

6 0

3 years ago

I need help immediately, thank you.

vitfil [10]

1.
g(x) = 3 - x^2
g(-2) = 3 - (-2)^2 = 3 - 4 = -1

f(x) = 5x + 4
g(g(-2)) = f(-1) = 5(-1) + 4 = -1

2.
f(x) = 5x + 4
f(-2) = 5(-2) + 4 = -10 + 4 = -6

g(x) = 3 - x^2
g(f(-2)) = g(-6) = 3 - (-6)^2 = 3 - 36 = -33

5 0

4 years ago

Which statements about the area of the faces of the rectangular prism are true? Select all that apply.

LenaWriter [7]

Answer: The front face has an area of 30 ft2. , The top face has an area of 40 ft2. ,

Step-by-step explanation: SOrry if im wrong

5 0

3 years ago