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3 years ago

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:

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=3+1/3−1−2/3Solving the whole number parts3−1=2Solving the fraction parts1/3−2/3=−1/3Combining the whole and fraction parts2−1/3=1 2/3

6 0

3 years ago

Read 2 more answers

Solve for a. ab + c = d.

Vadim26 [7]

Answer:

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