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2 years ago

Sasha's mom bought a container with 150

Mathematics

1 answer:

Crazy boy [7]2 years ago

5 0

Answer:

between 18 and 19

Step-by-step explanation:

150/8= 18.75

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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

I have 3 more , thanks

V125BC [204]

3.606 is the answer
H^2 = P^2 + B^2
H^2 = 3^2 + 2^2
H^2 = 9+4
H^2 = 13
H = root 13
H = 3.606 (simple radical Form)

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3 years ago

Need Help PLEASE Ex 1:A scale model of a human heart is 196 inches long. The scale is 32 to 1. how many inches long is the actua

N76 [4]

Answer: The actual heart is approximately 6.125 or rounded to 6

Step-by-step explanation: Divide the scale model 196 inches by 32 (the scale)

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4 years ago

Find the circumference of the circle.<br> Use = 3.14 diameter=12cm

Rasek [7]

Answer:

37.7cm

your welcome lol

3 0

3 years ago

Help ASAP pls , show steps too if possible

trasher [3.6K]

Answer:

Step-by-step explanation:

60942.44577

anwser is ii

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2 years ago