User Account

All Pages

Calculate a confidence interval for the mean weekly salary

Assignment Help Basic Statistics
Reference no: EM132907275

A simple random sample of 225 workers in a large factory had weekly salaries with a sample mean of $600 and a population standard deviation of $30. (a) Calculate a 99% confidence interval for the mean weekly salary of all workers in the factory. (b) How many more workers should be sampled if it is required that the estimate must be within L3 of the true average (again, with 99% confidence)? Hint: This means a tolerance of L3 - equivalent to a confidence interval width of $6.

Reference no: EM132907275

Questions Cloud

What is the cost of materials used in production : During February, purchases of direct materials were $36,000. What is the cost of materials used in production
Determining the conditions of a binomial experiment : Consider the distribution of Asian blood types. Assume we are sampling from the Asian population. If we were to randomly select 10 people of Asian descent, what
What is the probability that the second ball is black : An urn contains 3 black balls and 2 red balls. Balls are selected one at a time without replacement.
What is the value of the statistic : Freddie is a tennis player who is working on his first serve. While practicing, he gets 12 out of 20 of his first serves in. Freddie wants to know if his long-r
Calculate a confidence interval for the mean weekly salary : A simple random sample of 225 workers in a large factory had weekly salaries with a sample mean of $600 and a population standard deviation of $30.
What is the ending balance of bad debt expense : What is the ending balance of Bad Debt Expense after the proper adjusting journal entry to estimate uncollectibles for the period has been made
What are the effects of cutoff values : What are the effects of cutoff values on the accuracy and precision of classification methods?
Explain percentile of normal distribution : The distribution of IQ scores for high school graduates is normally distributed with mean u= 100 and standard deviation = 9. What is the 95th percentile of this
Explain percentage of women : Assuming that the heights of college women are normally distributed with mean 69 inches and standard deviation 1.5 inches, answer the following questions.

Reviews

Write a Review

Basic Statistics Questions & Answers

  Statistics-probability assignment

MATH1550H: Assignment:  Question:  A word is selected at random from the following poem of Persian poet and mathematician Omar Khayyam (1048-1131), translated by English poet Edward Fitzgerald (1808-1883). Find the expected value of the length of th..

  What is the least number

MATH1550H: Assignment:  Question:     what is the least number of applicants that should be interviewed so as to have at least 50% chance of finding one such secretary?

  Determine the value of k

MATH1550H: Assignment:  Question:     Experience shows that X, the number of customers entering a post office during any period of time t, is a random variable the probability mass function of which is of the form

  What is the probability

MATH1550H: Assignment:Questions: (Genetics) What is the probability that at most two of the offspring are aa?

  Binomial distributions

MATH1550H: Assignment:  Questions:  Let’s assume the department of Mathematics of Trent University has 11 faculty members. For i = 0; 1; 2; 3; find pi, the probability that i of them were born on Canada Day using the binomial distributions.

  Caselet on mcdonald’s vs. burger king - waiting time

Caselet on McDonald’s vs. Burger King - Waiting time

  Generate descriptive statistics

Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.

  Sampling variability and standard error

Problems on Sampling Variability and Standard Error and Confidence Intervals

  Estimate the population mean

Estimate the population mean

  Conduct a marketing experiment

Conduct a marketing experiment in which students are to taste one of two different brands of soft drink

  Find out the probability

Find out the probability

  Linear programming models

LINEAR PROGRAMMING MODELS

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd