Calculus and Above

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A marketing research company desires to know the mean
A marketing research company desires to know the mean consumption of milk per week among people over age 30. A sample of 830 people over age 30 was drawn and the mean milk consumption was 3.4 liters. … read more
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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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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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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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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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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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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
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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
Sandhya_sharma
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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 135 millimeters, and a variance of 64.If a random sample of 46 steel bolts is selected, … read more
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The weights of steers in a herd are distributed normally.
The weights of steers in a herd are distributed normally. The variance is 90,000and the mean steer weight is 1400lbs⁢ lbs . Find the probability that the weight of a randomly selected steer is less th… read more
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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
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Bachelor's Degree
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Find the standardized variable Z if X has Mean 48 and standard
Find the standardized variable Z if X has Mean 48 and standard deviation 9. Your answer: Z = (X - ) / Open Show Work Find the standardized variable Z if X has Mean 157 and variance 36. Your answer: Z … read more
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Teacher
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The monthly incomes for 12 randomly selected people
13.) The monthly incomes for 12 randomly selected people, each with bachelor's degree in economics, are shown on the right: 4450.77 4596.43 4366.21 4455.62 4151.34 3727.06 4283.99 4527.57 4407.44 3946… read more
Ryan
Bachelor's Degree
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"For Guru2009 only" 1. A random sample of fifty-five 200-meter
"For Guru2009 only" 1. A random sample of fifty-five 200-meter swims has a mean time of 3.98 minutes and a standard deviation of 0.06 minutes. Construct a 905 confidence interval for the population me… read more
Chirag
Master's Degree
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Total cholesterol levels of a sample of men aged 35-44 are
A total cholesterol levels of a sample of men aged 35-44 are normally distributed with a mean of 203 milligrams per deciliter and a standard deviation of 38.3 milligrams per deciliter. a. What percent… read more
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A fish that the RV Langley catches very frequently is hogchoker
A fish that the RV Langley catches very frequently is hogchoker ( Trinectes maculatus ). Hogchokers were caught in 87% of the tows made in the summer of 2009. Based on this, calculate the probability … read more
Math-John
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