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5. Assume that electric bill amounts are from a population that is distributed NS65, a. Calculate...
The amounts of electricity bills for all households in a city have a skewed probability distribution...
The amounts of electricity bills for all households in a city have a skewed probability distribution with a mean of $145 and a standard deviation of $36. Find the probability that the mean amount of electric bills for a random sample of 75 households selected from this city will be between $137 and $150. Round your answer to four decimal places.
Assume that the cans of Coke are filled so that the actual amounts are normally distributed with ...
Assume that the cans of Coke are filled so that the actual amounts are normally distributed with a mean of 12.00 oz and a standard deviation of 0.11oz. (a) Find the probability that a single can has at least 12.19 g3 (b) Find the probability that a single can has at most 13.00 gz (c) Find the probability that a sample of 26 cans have a mean of at least 12.19 oz (d) If it is required that 60% of...
Assume that the electric bills of Southern California Edison are normally distributed with a mean of...
Assume that the electric bills of Southern California Edison are normally distributed with a mean of $100 and a standard deviation of $15. Find the bill amount such that 20% of the households have a bill higher than this amount.
alle Electric bills: According to a government energy agency, the mean monthly household electricity bill in...
alle Electric bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $109.72. Assume the amounts are normally distributed with standard deviation $24.00. (a) What proportion of bills are greater than $1317 (b) What proportion of bills are between $87 and 51407 (c) What is the probability that a randomly selected household had a monthly bill less than $1257 Round the answers to at least four decimal places. Part: 0/3...
The amount of Jens monthly phone bill is normally distributed with a mean of $50 and...
The
amount of Jens monthly phone bill is normally distributed with a
mean of $50 and a standard deviation of $9. What percentage of her
phone bills are between $23 and $77?
The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of 59. what percentage of her phone bills are between 523 and 5777 99.99 99.74 095 68
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:
A random sample is drawn from a normally distributed population with mean μ = 24 and...
A random sample is drawn from a normally distributed population with mean μ = 24 and standard deviation σ = 1.6. a. Are the sampling distribution of the sample mean with n = 32 and n = 63 normally distributed? Yes, both the sample means will have a normal distribution. No, both the sample means will not have a normal distribution. No, only the sample mean with n = 32 will have a normal distribution. No, only the sample mean...
9. In a population of 5000 subjects, 600 posses a certain characteristic. A sample of 120...
9. In a population of 5000 subjects, 600 posses a certain characteristic. A sample of 120 subjects selected from this population contains 18 subjects who possess the same characteristic. What are the values of the population and sample proportions? 10. In a population of 9500 subjects, 75% have a certain characteristic. In a sample of 400 subjects selected from this population, 78% possess the same characteristic. How many subjects in the population and sample, respectively, possess this characteristic? 11. According...
A normally distributed population has a mean of 600 and a standard deviation of 60. a....
A normally distributed population has a mean of 600 and a standard deviation of 60. a. Determine the probability that a random sample of size 25 selected from this population will have a sample mean less than 579. b. Determine the probability that a random sample of size 16 selected from the population will have a sample mean greater than or equal to 636.
A random sample of size n = 25 is obtained from a normally distributed population with...
A random sample of size n = 25 is obtained from a normally distributed population with population mean μ =200 and variance σ^2 = 100. a) What are the mean and standard deviation of the sampling distribution for the sample means? b) What is the probability that the sample mean is greater than 203? c) What is the value of the sample variance such that 5% of the sample variances would be less than this value? d) What is the...
The amounts of electricity bills for all households in a city have a skewed probability distribution with a mean of $145 and a standard deviation of $36. Find the probability that the mean amount of electric bills for a random sample of 75 households selected from this city will be between $137 and $150. Round your answer to four decimal places.
Assume that the cans of Coke are filled so that the actual amounts are normally distributed with a mean of 12.00 oz and a standard deviation of 0.11oz. (a) Find the probability that a single can has at least 12.19 g3 (b) Find the probability that a single can has at most 13.00 gz (c) Find the probability that a sample of 26 cans have a mean of at least 12.19 oz (d) If it is required that 60% of...
alle Electric bills: According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $109.72. Assume the amounts are normally distributed with standard deviation $24.00. (a) What proportion of bills are greater than $1317 (b) What proportion of bills are between $87 and 51407 (c) What is the probability that a randomly selected household had a monthly bill less than $1257 Round the answers to at least four decimal places. Part: 0/3...
The
amount of Jens monthly phone bill is normally distributed with a
mean of $50 and a standard deviation of $9. What percentage of her
phone bills are between $23 and $77?
The amount of Jen's monthly phone bill is normally distributed with a mean of $50 and a standard deviation of 59. what percentage of her phone bills are between 523 and 5777 99.99 99.74 095 68
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:
9. In a population of 5000 subjects, 600 posses a certain characteristic. A sample of 120 subjects selected from this population contains 18 subjects who possess the same characteristic. What are the values of the population and sample proportions? 10. In a population of 9500 subjects, 75% have a certain characteristic. In a sample of 400 subjects selected from this population, 78% possess the same characteristic. How many subjects in the population and sample, respectively, possess this characteristic? 11. According...
A normally distributed population has a mean of 600 and a standard deviation of 60. a. Determine the probability that a random sample of size 25 selected from this population will have a sample mean less than 579. b. Determine the probability that a random sample of size 16 selected from the population will have a sample mean greater than or equal to 636.
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