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melomori [17]
3 years ago
5

Help! i don’t understand pls help

Mathematics
1 answer:
kramer3 years ago
4 0
Domain is all possible x values that the line has on the graph. X values go across. Y values go up and down
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A machine produces metal pieces that are cylindrical in shape. A sample of pieces is taken, and the diameters are found to be 1.
Ghella [55]

Answer:

99% confidence interval: (0.97816,1.03184)          

Step-by-step explanation:

We are given the following data set:

1.01, 0.97, 1.03, 1.04, 0.99, 0.98, 0.99, 1.01, 1.03

Formula:

\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.  

Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}

Mean =\displaystyle\frac{9.05}{9} = 1.005

Sum of squares of differences = 0.00001975308642 + 0.001264197531 + 0.000597530864 + 0.001186419753 + 0.0002419753088, + 0.00065308642 + 0.0002419753088 + 0.00001975308642 + 0.000597530864 = 0.0048

S.D = \sqrt{\frac{0.0048}{8}} = 0.024

Confidence interval:

\bar{x} \pm t_{critical}\frac{s}{\sqrt{n}}

Putting the values, we get,

t_{critical}\text{ at degree of freedom 8}~\alpha_{0.01} = \pm 3.355

1.005 \pm 3.355(\frac{0.024}{\sqrt{9}} ) = 1.005 \pm 0.02684 = (0.97816,1.03184)

6 0
3 years ago
I NEED HELP!!!!!! if u can I would be so happy
pychu [463]

Answer:

D

Step-by-step explanation

1 boy + 1 boy= 2 boys since she doesn't choose the same people twice

The total amount of students is 26

the answer would be 2/26

since you can simplify it

it would be 2/2=1

and 26/2=13

so 1/13 would be your answer

HOPE THIS HELPS

5 0
3 years ago
What is 3 1/3 - 1 2/3 with showing the work
givi [52]
Answer is: 1 2/3
Rewriting our equation with parts separated<span><span>=3+<span>1/3</span>−1−<span>2/3</span></span></span>Solving the whole number parts<span><span>3−1=2</span></span>Solving the fraction parts<span><span><span>1/3</span>−<span>2/3</span>=−<span>1/3</span></span></span>Combining the whole and fraction parts<span><span>2−<span>1/3</span>=1 <span>2/3</span></span></span>
6 0
3 years ago
Read 2 more answers
Solve for a.<br> ab + c = d.
Vadim26 [7]

Answer:

a = \frac{d - c}{b}

Step-by-step explanation:

ab + c = d

     - c        - c

ab = d - c

divide both sides by b

a = \frac{d - c}{b}

I hope this helps!!

8 0
3 years ago
Read 2 more answers
A water sprinkler has a range of 5 meters as shown. The jet of water from the sprinkler sweeps out at an angle of 85° as the noz
Mashutka [201]
 3.14*5^2=78.5
78.5*85/360=18.5
8 0
3 years ago
Read 2 more answers
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