The "Garbage Project" at the University of Arizona reports that the amount of paper discarded by...
The "Garbage Project" at the University of Arizona reports that the amount of paper discarded by households per week is normally distributed with mean 9.4 lb and standard deviation 4.2 lb. What percentage of households throw out at least 12 lb of paper a week? (Round your answer to one decimal place.
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The "Garbage Project" at the University of Arizona reports that the amount of paper discarded by...
The "Garbage Project" at the University of Arizona reports that the amount of paper discarded by...
The "Garbage Project" at the University of Arizona reports that the amount of paper discarded by households per week is normally distributed with mean 9.4 lb and standard deviation 4.2 lb. What percentage of households throw out at least 12 lb of paper a week? (Round your answer to one decimal place.
PROBLEM 2 / Question 4 (2 points): Based on data from the Garbage Project conducted by...
PROBLEM 2 / Question 4 (2 points): Based on data from the Garbage Project conducted by the Midwestern State University, the weights of paper discarded by the households in a certain residential area weekly are Normally distributed with the average of 8.95 lb and the standard deviation of 3.12 lb. Find the lower quartile of the weekly discarded paper weights in this area. (Round your answer to 2 places after the decimal point). a) 11.04 lb b) 6.86 lb c)...
The city of Providence supervisor claims that the mean weight of all garbage discarded by households...
The city of Providence supervisor claims that the mean weight of all garbage discarded by households each week is 31 lb. A random sample of 49 households shows that the sample mean is 30.14 with a standard deviation of 10.06 lb. Is there evidence to reject the supervisor's claim? (use α=0.05 and the rejection region approach).
The average of the individual weights of garbages discarded by 17 households in one week have...
The average of the individual weights of garbages discarded by 17 households in one week have a mean of 35 lb. Assume that the standard deviation of the weights is 14.6 lb. Use α = .05 to test the claim that the population of households has a mean less than 33.22 lb, which is the maximum amount that can be handled by the current waste removal system. H0: HA: α= Z= p=
A data set includes weights of garbage discarded in one week from 62 different households. The...
A data set includes weights of garbage discarded in one week from 62 different households. The paired weights of paper and glass were used to obtain the results shown to the right. Is there sufficient evidence to support the claim that there is a linear correlation between weights of discarded paper and glass? Use a significance level of a = 0.05. Correlation matrix: Variables Paper Glass 10.1379 Glass 0.1379 Click here to view a table of critical values for the...
Scores on a 100-point final exam administered to all applied calculus classes at a large university are normally di...
Scores on a 100-point final exam administered to all applied calculus classes at a large university are normally distributed with a mean of 69.3 and a standard deviation of 29.45. (a) What percentage of students taking the test had scores between 60 and 80? (Round your answer to one decimal place.) % (b) At what score was the rate of change of the probability density function for the scores a maximum?
Scores on a 100-point final exam administered to all...
Question 6 (1 point) A survey among freshmen at a certain university revealed that the number...
Question 6 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 7 What is the probability that a randomly selected student spent between 26 and 40 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer: Answer Question 7 (1.2 points) The...
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number...
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average time spent studying for the sample was between 28.7 and 30 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write...
Suppose X, the amount of money a student at a university spent on books in 2017,...
Suppose X, the amount of money a student at a university spent on books in 2017, was normally distributed with mean $550 and standard deviation $250 (that is, µ = 550 and σ = 250). Compute the probability that a randomly selected student at this university spent between $520 and $580 on books in 2017 (that is, compute P(520 ≤ X ≤ 580)). (Show work)
Question 2 (4.2 points) In a certain city, the monthly water bill amount is normally distributed...
Question 2 (4.2 points) In a certain city, the monthly water bill amount is normally distributed with mean 25 and standard deviation 15. A sample of 36 bills was selected. What is the probability that the average water bill amount for the sample was between 28.7 and 30? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer:
PROBLEM 2 / Question 4 (2 points): Based on data from the Garbage Project conducted by the Midwestern State University, the weights of paper discarded by the households in a certain residential area weekly are Normally distributed with the average of 8.95 lb and the standard deviation of 3.12 lb. Find the lower quartile of the weekly discarded paper weights in this area. (Round your answer to 2 places after the decimal point). a) 11.04 lb b) 6.86 lb c)...
A data set includes weights of garbage discarded in one week from 62 different households. The paired weights of paper and glass were used to obtain the results shown to the right. Is there sufficient evidence to support the claim that there is a linear correlation between weights of discarded paper and glass? Use a significance level of a = 0.05. Correlation matrix: Variables Paper Glass 10.1379 Glass 0.1379 Click here to view a table of critical values for the...
Scores on a 100-point final exam administered to all applied calculus classes at a large university are normally distributed with a mean of 69.3 and a standard deviation of 29.45. (a) What percentage of students taking the test had scores between 60 and 80? (Round your answer to one decimal place.) % (b) At what score was the rate of change of the probability density function for the scores a maximum?
Scores on a 100-point final exam administered to all...
Question 6 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 7 What is the probability that a randomly selected student spent between 26 and 40 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer: Answer Question 7 (1.2 points) The...
Question 8 (1 point) A survey among freshmen at a certain university revealed that the number of hours spent studying the week before final exams was normally distributed with mean 25 and standard deviation 15. A sample of 36 students was selected. What is the probability that the average time spent studying for the sample was between 28.7 and 30 hours studying? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write...
Question 2 (4.2 points) In a certain city, the monthly water bill amount is normally distributed with mean 25 and standard deviation 15. A sample of 36 bills was selected. What is the probability that the average water bill amount for the sample was between 28.7 and 30? Write only a number as your answer. Round to 4 decimal places (for example 0.0048). Do not write as a percentage. Your Answer:
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