PROBLEM: The average hourly wage of carpenters is normally distributed with a population mean of $62.00...

PROBLEM:

The average hourly wage of carpenters is normally distributed with a population mean of $62.00 and a population standard deviation of $8.00. Calculate the following:

(a) The proportion of carpenters earning between $48 and $50.

(b) The proportion of carpenters earning more than $67.

(c)The proportion of carpenters earning less than $52.

(d) The 85^th percentile.

Solutions

Expert Solution

milcah answered 1 year ago

Next > < Previous

Related Solutions

Given the following information, determine the burdened hourly wage rate for a carpenter. Assume the carpenters...

Given the following information, determine the burdened hourly wage rate for a carpenter. Assume the carpenters take full advantage of the retirement benefit. Wage rate - $23.00/hour Hours worked - 45 hours/week for 30 weeks, and 40 hours per week for 20 weeks Vacation, holidays, and sick leave – two weeks at 40 hours/week Overtime – Time-and-a-half for any hours over 40 per week Gas allowance - $150/month Annual bonus - $300 Social Security – 6.2% on the first $106,800...

Suppose the average bus wait times are normally distributed with an unknown population mean and a...

Suppose the average bus wait times are normally distributed with an unknown population mean and a population standard deviation of of five minutes. A random sample of 30 bus wait times are taken and has a sample mean of 25 minutes. Find a 95% confidence interval estimate for the population mean wait time.

suppose average pizza delivery times are normally distributed with unknown population mean and population standard deviation...

suppose average pizza delivery times are normally distributed with unknown population mean and population standard deviation of 6. A random sample of 28 pizza delivery restaurants is taken and has a sample mean of delivery time of 36 minutes. Show your work. A. find critical value of 99% confidence level b. sketch graph c. what distribution should you use for this problem d. calculate error bound e. lower endpoint upper endpoint

1) suppose average pizza delivery times are normally distributed with an unknown population mean and a...

1) suppose average pizza delivery times are normally distributed with an unknown population mean and a population standard deviation of 6 minutes. A random sample of 28 pizza delivery restaurants is taken and has a sample mean delivery time of 36 minutes. Find a 90% confidence interval estimate for the population mean delivery time.

Average pizza delivery times to the West Loop are normally distributed with an unknown population mean...

Average pizza delivery times to the West Loop are normally distributed with an unknown population mean and a population standard deviation of six minutes. Students in 270 at UIC collect a random sample of 28 pizza deliveries to the West is taken and they find sample mean delivery time of 36 minutes. Find a 60 and 95 percent confidence interval for µ.

Assume that a population is normally distributed with a population mean of μ = 8 and...

Assume that a population is normally distributed with a population mean of μ = 8 and a population standard deviation of s = 2. [Notation: X ~ N(8,2) ] Use the Unit Normal Table to answer the following questions. (I suggest you draw a picture of the normal curve when answering these questions.) 8. Let X=4 Compute the z-score of X. For that z-score: a. What proportion of the area under the Unit Normal Curve is in the tail? b....

Assume that a population is normally distributed with a population mean of μ = 8 and...

Assume that a population is normally distributed with a population mean of μ = 8 and a population standard deviation of s = 2. [Notation: X ~ N(8,2) ] Use the Unit Normal Table to answer the following questions. (I suggest you draw a picture of the normal curve when answering these questions.) 8. Let X=7 Compute the z-score of X. For that z-score: a. What proportion of the area under the Unit Normal Curve is in the tail? b....

The IQs of a population are normally distributed with a mean of 100 and a standard...

The IQs of a population are normally distributed with a mean of 100 and a standard deviation of 18. a) What is the probability of a person selected at random having an IQ greater than 109? b) What is the probability that a random sample of 20 people will have a mean IQ greater than 109?

a. A population is normally distributed with a mean of 16.4 and a standard deviation of...

a. A population is normally distributed with a mean of 16.4 and a standard deviation of 1.4. A sample of size 36 is taken from the population. What is the the standard deviation of the sampling distribution? Round to the nearest thousandth. b. A population is normally distributed with a mean of 15.7 and a standard deviation of 1.4. A sample of size 24 is taken from the population. What is the the standard deviation of the sampling distribution? Round...

1. A variable is normally distributed in the population with a mean of 100 and a...

1. A variable is normally distributed in the population with a mean of 100 and a standard deviation of 10. A sample of 20 is randomly selected. The probability that the sample mean is between 90 and 110 is _______ the probability that the variable is between 90 and 110. greater than less than equal to not comparable with 2.the general manager of a logistic consulting group believes that 28% of the firm's orders come from new customers. A simple...

Subjects