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2 years ago

A flo chart proof uses a(n)____

Mathematics

1 answer:

erma4kov [3.2K]2 years ago

3 0

Answer: A. graphical

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I need help with 7.68+13.07

horrorfan [7]

The answer for that would be 20.75

6 0

3 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

Which sign makes this number sentence true?

lyudmila [28]

The answer to your question is A

3 0

3 years ago

Pls help

kap26 [50]

ANSWER

$d. 661.9 {yd}^{2}$

EXPLANATION

The area of the given triangle can be calculated using the formula,

$Area= \frac{1}{2} bc \sin(A)$

Where b=54yd , c=54yd,and A=27° is the included angle.

We plug in these values to get;

$Area= \frac{1}{2} \times 54 \times 54 \sin(27 \degree)$

$Area=661.9 {yd}^{2}$

The correct answer is D.

4 0

4 years ago

The value of C has to be Greater than 0.65

grin007 [14]

Answer:

1.3

Step-by-step explanation:

1. .65 = .5c ---> .65/.5

2. 1.3 = c

4 0

3 years ago