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Question 5 (2 points) Data for a particular subdivision near downtown Houston indicate that the average...
QUESTION 17 EPA studies of fuel consumption indicate compact car mileage to be normally distributed with...
QUESTION 17 EPA studies of fuel consumption indicate compact car mileage to be normally distributed with a mean of 25.5 miles per gallon and a standard deviation of 5.0 mpg. What is the probability of compact cars gets between 20 and 40 mpg? (Please answer in terms of a decimal, eg 0.12) QUESTION 18 Suppose the amount of heating oil used annually by households in lowa is normally distributed with mean 200 gallons per household per year and standard deviation...
1. The average amount parents and children spent per child on back-to-school clothes in Autumn 2010...
1. The average amount parents and children spent per child on back-to-school clothes in Autumn 2010 was $527. Assume the standard deviation is $160 and that the amount spent is normally distributed. What is the probability that the amount spent on a randomly selected child is more than $700? (Round to four decimal places) What is the probability that the amount spent on a randomly selected child is less than $100? (Round to four decimal places) What is the probability...
Question 3 of 3 (2 points) 6.2 Section Exercise 20 If the average price of a...
Question 3 of 3 (2 points) 6.2 Section Exercise 20 If the average price of a new one family home is $246.300 with a standard deviation of $15,000, find the minimum and maximum prices of the houses that a contractor will build to satisfy the middle 40% of the market. Assume that the variable is normally distributed. Round-value calculations to 2 decimal places and final answers to the nearest dollar. Source: New York Times Almanac. Minimum price : S Maximum...
Question 2 Based on data from the 1980Census the average age of a Na'alehu County, Hawaii...
Question 2 Based on data from the 1980Census the average age of a Na'alehu County, Hawaii resident is 39 years with a standard deviation of 22. 6 . The data is normally distributed. If 100 residents are surveyed, Determine the Inter Quartile range (IQR) for the average age of the residents of this County. Please explain how you derived your answer: Question 3 If the number of degrees of freedom for a chi-square distribution is 32. Determine the population mean...
Next Previous 3 4 5 6 Question 2 of 6 (1 point) View problem in a pop-up According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91...
Next Previous 3 4 5 6 Question 2 of 6 (1 point) View problem in a pop-up According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91 per square foot. A random sample of 37 new homes indicated that the mean cost was $121.14 and the standard deviation was $20. Can it be concluded that the mean Fo cost differs from $117.91, using the 0.10 level of significance? Use thP...
2. (3 points) The diameter of ball bearings produced in a manufacturing process at a particular...
2. (3 points) The diameter of ball bearings produced in a manufacturing process at a particular company can be explained using a uniform distribution. All the ball bearings produced have a diameter that ranges over the interval 3.5 milimeters to 5.5 milimeters. What is the probability that a randomly selected ball bearing will have a diameter greater than 4.4 milimeters? 3. (3.5 points) The monthly incomes of trainees at a local mill are normally distributed with a mean of $1050...
Your answer is partially correct. Try again Suppose that in past years the average price per...
Your answer is partially correct. Try again Suppose that in past years the average price per square foot for warehouses in the United States has been $32.29. A national real estate investor wants to determine whether that figure has changed now. The investor hires a researcher who randomly samples 48 warehouses that are for sale across the United States and finds that the mean price per square foot is $31.62, with a standard deviation of $1.27. Assume that prices of...
Question 2 (5 points) Suppose that a sample of size 58 is drawn from a population...
Question 2 (5 points) Suppose that a sample of size 58 is drawn from a population with mean 55 and standard deviation 38 . Find the value of o,, the standard deviation of the distribution of sample means. Write only a number as your answer. Round to two decimal places (for example: 8.21). Your Answer Answer Question 3 (5 points) The weights of bowling balls are normally distributed with mean 11.5 pounds and standard deviation 2.7 pounds. A sample of...
10.9 12.6 14.3 16 Question 8 1 pts The number of points on a particular test are normally distributed. The average number of points is 16: the standard deviation is 1.7 points. Use the empir...
10.9 12.6 14.3 16 Question 8 1 pts The number of points on a particular test are normally distributed. The average number of points is 16: the standard deviation is 1.7 points. Use the empirical rule estimate the probability of the points being less than 12.6. Question4 For a school project, two students Shona and Miguel, recorded the number of text messages each of them sent each day for a 60-day period The box plots summarize the data Shona Miguel...
Researchers report that children between the ages of 2 and 5 years watch an average of...
Researchers report that children between the ages of 2 and 5 years watch an average of 25 hours of television per week. Assume that the variable time is distributed normally with a standard deviation of 2 hours. A random sample of 40 children between the ages of 2 and 5 was chosen. What is the probability that the average time of the selected group of 40 children between the ages of 2 and 5 watch more than 25.5 hours of...
QUESTION 17 EPA studies of fuel consumption indicate compact car mileage to be normally distributed with a mean of 25.5 miles per gallon and a standard deviation of 5.0 mpg. What is the probability of compact cars gets between 20 and 40 mpg? (Please answer in terms of a decimal, eg 0.12) QUESTION 18 Suppose the amount of heating oil used annually by households in lowa is normally distributed with mean 200 gallons per household per year and standard deviation...
Question 3 of 3 (2 points) 6.2 Section Exercise 20 If the average price of a new one family home is $246.300 with a standard deviation of $15,000, find the minimum and maximum prices of the houses that a contractor will build to satisfy the middle 40% of the market. Assume that the variable is normally distributed. Round-value calculations to 2 decimal places and final answers to the nearest dollar. Source: New York Times Almanac. Minimum price : S Maximum...
Next Previous 3 4 5 6 Question 2 of 6 (1 point) View problem in a pop-up According to the National Association of Home Builders, the average cost of building a home in the Northeast is $117.91 per square foot. A random sample of 37 new homes indicated that the mean cost was $121.14 and the standard deviation was $20. Can it be concluded that the mean Fo cost differs from $117.91, using the 0.10 level of significance? Use thP...
2. (3 points) The diameter of ball bearings produced in a manufacturing process at a particular company can be explained using a uniform distribution. All the ball bearings produced have a diameter that ranges over the interval 3.5 milimeters to 5.5 milimeters. What is the probability that a randomly selected ball bearing will have a diameter greater than 4.4 milimeters? 3. (3.5 points) The monthly incomes of trainees at a local mill are normally distributed with a mean of $1050...
Your answer is partially correct. Try again Suppose that in past years the average price per square foot for warehouses in the United States has been $32.29. A national real estate investor wants to determine whether that figure has changed now. The investor hires a researcher who randomly samples 48 warehouses that are for sale across the United States and finds that the mean price per square foot is $31.62, with a standard deviation of $1.27. Assume that prices of...
Question 2 (5 points) Suppose that a sample of size 58 is drawn from a population with mean 55 and standard deviation 38 . Find the value of o,, the standard deviation of the distribution of sample means. Write only a number as your answer. Round to two decimal places (for example: 8.21). Your Answer Answer Question 3 (5 points) The weights of bowling balls are normally distributed with mean 11.5 pounds and standard deviation 2.7 pounds. A sample of...
10.9 12.6 14.3 16 Question 8 1 pts The number of points on a particular test are normally distributed. The average number of points is 16: the standard deviation is 1.7 points. Use the empirical rule estimate the probability of the points being less than 12.6. Question4 For a school project, two students Shona and Miguel, recorded the number of text messages each of them sent each day for a 60-day period The box plots summarize the data Shona Miguel...
Researchers report that children between the ages of 2 and 5 years watch an average of 25 hours of television per week. Assume that the variable time is distributed normally with a standard deviation of 2 hours. A random sample of 40 children between the ages of 2 and 5 was chosen. What is the probability that the average time of the selected group of 40 children between the ages of 2 and 5 watch more than 25.5 hours of...
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