Calculus and Above

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A racing car consumes a mean of 86 gallons of gas per race
A racing car consumes a mean of 86 gallons of gas per race with a variance of 9.If 33 racing cars are randomly selected, what is the probability that the sample mean would be greater than 85.3 gallons… read more
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Thompson and Thompson is a steel bolts manufacturing
Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 125 millimeters, and a variance of 49.If a random sample of 41 steel bolts is selected, … read more
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Thompson and Thompson is a steel bolts manufacturing
Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 130 millimeters, and a variance of 64.If a random sample of 34 steel bolts is selected, … read more
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Thompson and Thompson is a steel bolts manufacturing
Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 143 millimeters, and a variance of 64.If a random sample of 32 steel bolts is selected, … read more
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Thompson and Thompson is a steel bolts manufacturing
Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 135 millimeters, and a variance of 64.If a random sample of 46 steel bolts is selected, … read more
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Sandhya_sharma
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A racing car consumes a mean of 86 gallons of gas per race
A racing car consumes a mean of 86 gallons of gas per race with a standard deviation of 7 gallons.If 41 racing cars are randomly selected, what is the probability that the sample mean would be greater… read more
Sandhya_sharma
Sandhya_sharma
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A racing car consumes a mean of 86 gallons of gas per race
A racing car consumes a mean of 86 gallons of gas per race with a variance of 9.If 33 racing cars are randomly selected, what is the probability that the sample mean would be greater than 85.3 gallons… read more
Sandhya_sharma
Sandhya_sharma
Master's Degree
Master's Degree
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An operation manager at an electronics company wants to test
An operation manager at an electronics company wants to test their amplifiers. The design engineer claims they have a mean output of 451 watts with a variance of 144.What is the probability that the m… read more
Sandhya_sharma
Sandhya_sharma
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The mean number of words per minute (WPM) typed by a speed
The mean number of words per minute (WPM) typed by a speed typist is 147 with a variance of 144.What is the probability that the sample mean would be greater than 150.2 WPM if 59 speed typists are ran… read more
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Sandhya_sharma
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A quality control expert at Glotech computers wants to test
A quality control expert at Glotech computers wants to test their new monitors. The production manager claims they have a mean life of 85 months with a variance of 64.If the claim is true, what is the… read more
Sandhya_sharma
Sandhya_sharma
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A quality control expert at Glotech computers wants to test
A quality control expert at Glotech computers wants to test their new monitors. The production manager claims they have a mean life of 85 months with a variance of 64.If the claim is true, what is the… read more
Sandhya_sharma
Sandhya_sharma
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The mean per capita consumption of milk per year is 138
The mean per capita consumption of milk per year is 138 liters with a variance of 484.If a sample of 210 people is randomly selected, what is the probability that the sample mean would be less than 13… read more
Sandhya_sharma
Sandhya_sharma
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The mean per capita income is 16,127 dollars per annum with
The mean per capita income is 16,127 dollars per annum with a variance of 682,276.What is the probability that the sample mean would be less than 16219 dollars if a sample of 476 persons is randomly s… read more
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Sandhya_sharma
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The diameters of ball bearings are distributed normally. The
The diameters of ball bearings are distributed normally. The mean diameter is131 millimeters and the standard deviation is3 millimeters. Find the probability that the diameter of a selected bearing is… read more
R.R. Jha
R.R. Jha
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The diameters of ball bearings are distributed normally. The
The diameters of ball bearings are distributed normally. The mean diameter is 131millimeters and the standard deviation is 3millimeters. Find the probability that the diameter of a selected bearing is… read more
R.R. Jha
R.R. Jha
Bachelor's Degree
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The mean number of words per minute (WPM) read by sixth
The mean number of words per minute (WPM) read by sixth graders is 91with a variance of324 . If152 sixth graders are randomly selected, what is the probability that the sample mean would be greater th… read more
R.R. Jha
R.R. Jha
Bachelor's Degree
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2. Serum ferritin is used in diagnosing iron deficiency. In
2. Serum ferritin is used in diagnosing iron deficiency. In a study conducted recently researchers discovered that in a sample of 28 elderly men the sample standard deviation of serum ferritin was 52.… read more
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A company that produces DVD drives has a 8% defective rate.
I wanted to know how to work the following problems out: A company that produces DVD drives has a 8% defective rate. Let X represent the number of defectives in a random sample of 52 of their drives. … read more
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