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ivanzaharov [21]
3 years ago
11

class="latex-formula">
Mathematics
1 answer:
shtirl [24]3 years ago
8 0
B= a^2-6. That is if u are looking for what b is
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A machine that produces ball bearings has initially been set so that the true average diameter of the bearings it produces is .5
lara [203]

Answer:

7.3% of the bearings produced will not be acceptable

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 0.499, \sigma = 0.002

Target value of .500 in. A bearing is acceptable if its diameter is within .004 in. of this target value.

So bearing larger than 0.504 in or smaller than 0.496 in are not acceptable.

Larger than 0.504

1 subtracted by the pvalue of Z when X = 0.504.

Z = \frac{X - \mu}{\sigma}

Z = \frac{0.504 - 0.494}{0.002}

Z = 2.5

Z = 2.5 has a pvalue of 0.9938

1 - 0.9938= 0.0062

Smaller than 0.496

pvalue of Z when X = -1.5

Z = \frac{X - \mu}{\sigma}

Z = \frac{0.496 - 0.494}{0.002}

Z = -1.5

Z = -1.5 has a pvalue of 0.0668

0.0668 + 0.0062 = 0.073

7.3% of the bearings produced will not be acceptable

4 0
3 years ago
Can anyone help me out
Verizon [17]

Answer:

6 is the correct answer

Step-by-step explanation:

4*2=8

3*2=6

x=6

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3 years ago
What is m∠2 + m∠3?<br> HELPPPPP!!!!!
Eva8 [605]
I believe the answer is 90
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3 years ago
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Equation of a line that best fits the points (-4,10)(-1,5) (2,-1) (3,-6) (5,-7)
Slav-nsk [51]

Answer:

-2.02+2.22=trendline

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3 years ago
hugo sells handmade key chains online. Yesterday he made 6 keychains in 30minutes. hugo wants to make 9 keychains today . if hug
Art [367]

Answer:

45 minutes, hope this helps

Step-by-step explanation:

8 0
3 years ago
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