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matrenka [14]
2 years ago
9

I really need help with this question please!

Mathematics
1 answer:
never [62]2 years ago
5 0

<u>Answer is in attachment </u>

<u />

Mark brainliest pls :)

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The water diet requires you to drink two cups of water every half hour from the time you get up until you go to bed, but otherwi
Elan Coil [88]

Answer:

7-3.182 \frac{13.638}{\sqrt{4}}= -14.698

7+3.182 \frac{13.638}{\sqrt{4}}= 28.698

Step-by-step explanation:

For this case we have the following info given:

Weight before diet 180 125 240 150  

Weight after diet 170 130 215 152

We define the random variable D = before-after and we can calculate the inidividual values:

D: 10, -5, 25, -2

And we can calculate the mean with this formula:

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

And the deviation with:

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

And after replace we got:

\bar D= 7, s_d = 13.638

And the confidence interval for this case would be given by:

\bar D \pm t_{\alpha/2} \frac{s_d}{\sqrt{n}}

The degrees of freedom are given by:

df = n-1= 4-1=3

For the 95% of confidence the value for the significance is \alpha=0.05 and the critical value would be t_{\alpha/2}= 3.182. And replacing we got:

7-3.182 \frac{13.638}{\sqrt{4}}= -14.698

7+3.182 \frac{13.638}{\sqrt{4}}= 28.698

6 0
3 years ago
Give the boundaries of the indicated value.<br> 29.4 miles<br> The boundaries are<br> miles.
sineoko [7]

Answer:

The boundaries for the observed value, 42.8 miles are 42.75 miles up to 42.85 miles.

Step-by-step explanation:

hope it helps you friend ☺️

6 0
2 years ago
SOLVE FOR X !!!!!!! WILL ALWAYS GIVE BRAINLIEST!!!!!!!
mamaluj [8]

Answer:

59 degrees

Step-by-step explanation:

Inscibed angles in a circle encompass TWICE their value of arc degrees

2x = 118

x = 59 degrees

7 0
2 years ago
Is (3,1) a solution of the equation y=-x+3
kogti [31]

no i don't think so the answer will be (3,0)

3 0
3 years ago
Read 2 more answers
The actual distance between two villages is 120 km. On a map of the area, 0.5 cm represents 2 km. What is the actual distance be
otez555 [7]
If .5cm is 2km, then 1 cm is 4 km, and therefore 120/4 is 30, so 30 centimeters on the map
6 0
3 years ago
Read 2 more answers
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