Calculus and Above

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The average age of doctors in a certain hospital is 50.0
The average age of doctors in a certain hospital is 50.0 years old. Suppose the distribution of ages is normal and has a standard deviation of 6.0 years. If 9 doctors are chosen at random for a commit… read more
Ashok Kumar
Electrical Engineer
Master's Degree
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The average hourly wage of workers at a fast food restaurant
The average hourly wage of workers at a fast food restaurant is \$6.75/hr. Assume the wages are normally distributed with a standard deviation of \$0.44. If a worker at this fast food restaurant is sele… read more
Ashok Kumar
Electrical Engineer
Master's Degree
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The average gas mileage of a certain model car is 28.0 miles
The average gas mileage of a certain model car is 28.0 miles per gallon. If the gas mileages are normally distributed with a standard deviation of 0.4 miles per gallon, find the probability that a car… read more
Ashok Kumar
Electrical Engineer
Master's Degree
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The average age of vehicles registered in the United States
The average age of vehicles registered in the United States is 96 months. Assume the population is normally distributed with a standard deviation of 15 months. Find the probability that the mean age o… read more
Ashok Kumar
Electrical Engineer
Master's Degree
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The average length of crocodiles in a swamp is 10.5 feet. If
The average length of crocodiles in a swamp is 10.5 feet. If the lengths are normally distributed with a standard deviation of 1.3 feet, find the probability that a crocodile is more than 10 feet long… read more
Ashok Kumar
Electrical Engineer
Master's Degree
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The mean weight of loads of rock is 47.0 tons with a
The mean weight of loads of rock is 47.0 tons with a standard deviation of 8.0 tons. If 24 loads are chosen at random for a weight check, find the probability that the mean weight of those loads is le… read more
Ashok Kumar
Electrical Engineer
Master's Degree
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The average age of doctors in a certain hospital is 50.0
The average age of doctors in a certain hospital is 50.0 years old. Suppose the distribution of ages is normal and has a standard deviation of 6.0 years. If 9 doctors are chosen at random for a commit… read more
Kofi
Ph.D.
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For a class science experiment, the students had to grow
For a class science experiment, the students had to grow beans in a cup and see how tall they could grow them in two weeks. Their textbook suggested they could grow them to an average of 2 inches tall… read more
Sandhya_sharma
Master's Degree
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The sample space for tossing 3 coins consists of how many
The sample space for tossing 3 coins consists of how many outcomes?a. 8 b. 6 c. 4 d. 2 e. It cannot be determined… read more
Sandhya_sharma
Master's Degree
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1. When 3 marbles are drawn from a bag without replacement.
1. When 3 marbles are drawn from a bag without replacement. There are 5 purple, 6 green, 2 blue and 4 white marbles in the bag. Find the probability of getting.a) All green marbles. b) A purple, then … read more
Kofi
Ph.D.
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1. Find the indicated z score. The graph depicts the
1. Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. The indicated z score is? (Round to two decimal places as needed.) 2. Assume tha… read more
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For the problems that require a written response, please use
For the problems that require a written response, please use proper English and complete sentences. Your definitions and explanations should be explicit and meaningful from a statistical viewpoint. Wh… read more
Ryan
Bachelor's Degree
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For the problems that require a written response, please use
For the problems that require a written response, please use proper English and complete sentences. Your definitions and explanations should be explicit and meaningful from a statistical viewpoint. Wh… read more
Ray Atkinson
Bachelor's Degree
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1. What is the primary reason for applying a finite population
1. What is the primary reason for applying a finite population correction coefficient? A. If you don't apply the correction coefficient, your confidence intervals will be too narrow, and thus overconf… read more
Stevewh
Teacher
Bachelor's Degree
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TutoringCenter is closed today, and I need to check 9 out of
TutoringCenter is closed today, and I need to check 9 out of my 25 questions on a homework due tomorrow.. (1) The Average number of mosquitos in at stagnant pond is 80 per square meter with a standard… read more
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1. Which of the following is most likely a population as opposed
1. Which of the following is most likely a population as opposed to a sample? (Points : 4) respondents to a newspaper survey the first 5 students completing an assignment every third person to arrive … read more
Trigeoscal
College Math Professor
Master's Degree
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Explain these concepts: 1. Degree of freedom 2. Critical
Explain these concepts: 1. Degree of freedom 2. Critical values for Z and t test 3. Z - test and t-test… read more
Ryan
Bachelor's Degree
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Selecting a distribution for inferences on the population mean Suppose
Selecting a distribution for inferences on the population mean Suppose that we want to estimate the mean reading speed of second graders. The random sample of students' reading speeds we choose has a … read more
Scott
Master's Degree
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