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Vikki [24]
3 years ago
11

A Sampling of 409 motor Shafts from a very large production Batch shows a sample standard deviation in Diameter of 0.021 mm with

a sample mean of 9.251 mm Estimate the mean diameter of the entire batch at a %95 level of confidences?
Engineering
1 answer:
andrezito [222]3 years ago
7 0

Answer:

9.248 < \mu < 9.253 mm

Explanation:

Given data:

standard deviation  = 0.021 mm

sample mean = 9.251 mm

total sample = 409 m

confidence interval level = 95%

mean diameter of entire batch  \mu  = \bar X \pm z \frac{\sigma}{\sqrt{n}}

where

\bar X - sample mean = 9.251 mm

z = critical value

plugginf all value in the above relation to get the mean diameter

\mu = 9.251 \pm 1.96 \times \frac{0.021}{\sqrt{409}}

9.248 < \mu < 9.253 mm

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A 0.50 m3 drum was filled with 0.49 m3 of liquid water at 25oC and the remaining volume was water vapor without any air. The dru
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Explanation:

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3. It was started the water in the drum and its surrounding have same temperature.

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2. A F-22 Raptor has just climbed through an altitude of 9,874 m at 1,567 kph when a disk
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The pressure difference across the sensor housing will be "95 kPa".

According to the question, the values are:

Altitude,

  • 9874

Speed,

  • 1567 kph

Pressure,

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The temperature will be:

→ T = 15.04-[0.00649(9874)]

→     = 15.04-64.082

→     = -49.042^{\circ} C

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Learn more about pressure difference here:

brainly.com/question/15732832

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