Question: The average time spent by construction workers who work on weekends is 7.93 hours (over 2 days). Assume the distribution is approximately normal and has

The average time spent by construction workers who work on weekends is 7.93 hours (over 2 days). Assume the distribution is approximately normal and has a standard deviation of 0.8 hour.

a. Find the probability that an individual who works at that trade works fewer than 8 hours on the weekend.

b. If a sample of 40 construction workers is randomly selected, find the probability that the mean of the sample will be less than 8 hours.

Step by Step Solution

★★★★★

3.51 Rating (154 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

Solution a Step 1 Draw a normal distribution and shade the desired area Since the question concerns ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Elementary Statistics A Step By Step Approach Questions!

Math 200 - Project 1 This project will cover topics from chapters 1 through 4 of your textbook. All papers will need to be submitted in IvyLearn. You will be performing an analysis on a dataset that...

The Loop and Butterfly subdivision schemes can both operate on triangular meshes, in which all of the polygons have three sides. Both schemes subdivide the mesh by introducing new vertices at the...

Which solution is adopted by Ethernet and what measures are taken to ensure stability in circumstances of high load? [4 marks] 1 [TURN OVER CST.93.5.2 4 Graphics I A certain image contains a number Q...

Managing Scope Changes Case Study Scope changes on a project can occur regardless of how well the project is planned or executed. Scope changes can be the result of something that was omitted during...

Working Weekends. The average time spent by construction workers who work on weekends is 7.93 hours (over a period of 2 days). Assume the distribution is approximately normal and has a standard...

1)Here is a list of exam scores for the 14 students in Prof. Winkler's chemistry course: 60 61 61 65 72 75 75 78 81 81 85 89 91 98 What is the percentile of the person whose score was 65? Select one:...

EC Question 10: Confidence Intervals Homework . Answered . Due Dec 2nd, 11:59 PM The average time spent by construction workers who work on the weekends is 7.9 hours. Assume the distribution of...

. Find the area under the standard normal distribution curve. a) Between z = 0 and z = - 2.07 b)To the right of z = 0.23 c) Between z = -1.53 and z = -2.08 2. Find the probabilities for each, using...

STA 308 Homework #6 Due Tuesday, March 29th Spring 2016 NOTE: All questions should be handed in. Selected questions would be graded. 1. According to the US Bureau of Labor Statistics publication...

1. In a certain countrywide school district, a survey of 280 students showed that 34% carried their lunches to school. Find the 99% confidence interval of the true proportion of students who carried...

work plese help 5. A study of 415 students showed that they have seen an average 3000 hours of TV. If the sample standard deviation is 400, find the 90% confidence level of the mean for all students....

Cowboy Joe wishes to shoot his assailant by ricocheting a bullet off a mirrored metal plate. To do so, should he simply aim at the mirrored image of his assailant? Explain.

Hagger Sounds has accumulated the cost and net realizable value data on March 31: Cost Net Realizable Value iPods $24,000 $20,400 Cell phones 18,000 19,000 DVDs 28,000 25,600 Using the...

One of the morals of the red bead experiment is: (a) variation is part of the process (b) only management can change the system (c) it is the system that primarily determines performance (d) All of...

Briefly describe the Fire Legal Liability coverage found in Section II of the Homeowners Policy. To whom does it apply? What factors create the need for this coverage?

These data represent the net worth (in millions of dollars) of 45 national corporations. Class limits Frequency 1020 2 2131 8 3242 15 4353 7 5464 10 6575 3 Find the : Mean Modal class

A random sample of 30 states shows the number of specialty coffee shops for a specific company. Class boundaries Frequency 0.519.5 12 19.538.5 7 38.557.5 5 57.576.5 3 76.595.5 3 Find the : Mean Modal...

The number of short-term parking spaces at 15 airports is shown. 1962 750 900 9239 3400 8662 700 203 260 1479 5905 690 98223 2516

Faleye Consulting is deciding which of two computer systems to purchase. It can purchase state-of-the-art equipment (System A) for an after-tax cost of $23,000, which will generate after-tax cash...

An Asset possessed by the business should be shown in which part of balance sheet? A . Liabilities B . Assets C . Revenues D . Fixed Assets

urgently needed Q1. (50 pts) You are working as an Operations Research Intern at the European Headquarters of a single- type car manufacturer. As today's task, you have been asked to model an IP...