Questions
Red blood cells have an average lifespan of 120 days in the human body. If a...

Red blood cells have an average lifespan of 120 days in the human body. If a given individual produces 200 billion red blood cells per day, what is the average number of red bloods cells in his/her body? (Note: 1 trillion = 1000 billion) SHOW WORK

a) 1.6 trillion cells b) 8 trillion cells c) 16 trillion cells d) 24 trillion cells e) 30 trillion cells f) 600 trillion cells g) We do not have enough information to answer this question.

In: Statistics and Probability

According to a Human Resources report, a worker in the industrial countries spends on average 419...

According to a Human Resources report, a worker in the industrial countries spends on average 419 minutes a day on the job. Suppose the standard deviation of time spent on the job is 28 minutes. a. If the distribution of time spent on the job is approximately bell shaped, between what two times would 68% of the figures be? enter the lower limit for the interval where 68% of the values would fall 391 to enter the upper limit for the interval where 68% of the values would fall 447 b. If the distribution of time spent on the job is approximately bell shaped, between what two times would 95% of the figures be? enter the lower limit for the interval where 95% of the values would fall 363 to enter the upper limit for the interval where 95% of the values would fall 475 c. If the distribution of time spent on the job is approximately bell shaped, between what two times would 99.7% of the figures be? enter the lower limit for the interval where 99.7% of the values would fall 335 to enter the upper limit for the interval where 99.7% of the values would fall 503 d. If the shape of the distribution of times is unknown, approximately what percentage of the times would be between 360 and 478 minutes? enter percentages rounded to 1 decimal place 76.7 % (Round the intermediate values to 3 decimal places. Round your answer to 1 decimal place.) e. Suppose a worker spent 400 minutes on the job. What would that worker’s z score be, and what would it tell the researcher? z score = enter the z score rounded to 3 decimal places -0.679 (Round your answer to 3 decimal places.) This worker is in the lower half of workers but within select the distance from the mean standard deviation of the mean.

In: Statistics and Probability

Which of the following is TRUE of intercellular communication within a human body? (select ALL that...

Which of the following is TRUE of intercellular communication within a human body? (select ALL that apply)

a.

All necessary communication is achieved using HORMONES.
b.

It is important for coordinating homeostasis in a multicellular body.
c.

It often involves the use of chemical signaling between cells.
d.

It is important for coordinating growth of a multicellular body.
e.

It only is needed between cells that are distantly separated within the body.

In: Biology

[12] In an experiment on human behavior, a psychologist asks four men and four women to...

[12] In an experiment on human behavior, a psychologist asks four men and four women to enter a room and sit at a rectangular table. This table has three seats on each of the longer sides of the table, and one seat at each end of the table. The seats at the end of the table are considered to be the dominant seats. (A diagram may help you to visualize this).

a. If the people choose their seats randomly, determine the probability distribution for the random variable X, where X represents the number of women occupying the end seats. [4]

b. Determine E(X) and Var(X). [5]

c. In 15 independent repetitions of the experiment involving different people each time, calculate the probability that women occupy both end seats 2 or more times. [3]

In: Statistics and Probability

According to Wikipedia the oldest human was Jeanne Clament (122.5 years), and the oldest cat was...

According to Wikipedia the oldest human was Jeanne Clament (122.5 years), and the oldest cat was Crème Puff (38 years). The oldest organism in North America is often cited to be a bristlecone pine in California dated at 5065 years by ring count.. Still others claim that the oldest plant is actually a creosote bush in the Mojave desert, called King Clone, that is shaped as a ring that is 67 feet in diameter. Its age is estimated at 11,700 years. Others dispute this by stating that the oldest cells in these trees and shrubs are no more than a few years old. Explain how a plant can be so old but only have young cells. How old to you think the oldest cells in Jeanne Clament were?

In: Biology

Erica, the human resource manager, was frustrated by many of herhotel staff speaking Spanish in...

Erica, the human resource manager, was frustrated by many of her hotel staff speaking Spanish in the hallways and rooms as they were cleaning them.

The Sawmill Hotel where Erica works is situated in Minneapolis, Minnesota’s downtown. It’s target market includes sports enthusiasts attending nearby professional (Twins, Vikings, Timberwolves, Wild) games but also business professionals and families. This four-star hotel features an indoor and outdoor swimming pool, message center, three stores, two restaurants, and a beauty shop. Total staff includes about 10 managers, 30 cleaning assistants to take care of rooms, 10 front desk specialists, and 25 who are involved with the stores, restaurants, and beauty shops.   Each are required to focus on customer service as their number one value.

Erica hires everyone in the hotel except for the Chief Executive Officer, Vice President of Finance, and Vice President of Marketing. For the rest of the managers, the 30 cleaning assistants, store, restaurant, and beauty shop workers, she advertises for openings with the local job service and the Minneapolis Tribune (with the associated website). A typical Tribune ad for a cleaning assistant reads as follows: Cleaning Assistants Wanted, Sawmill Hotel, $9-11 hour, prepare rooms for customers and prepare laundry. Contact: Erica Hollie, Human Resource Manager, xxx-xxx-xxxx.

As a result of the advertising, Erica has been able to obtain good help through the local target market. Twenty seven of the thirty cleaning assistants are women. Twenty of the thirty have a Hispanic background. Of the Hispanics, all can speak English at varying levels.

Rachel, the lead cleaning assistant believes that maximizing communication among employees helps the assistants become more productive and stable within the hotel system. She uses both English and Spanish to talk to assistants under her. Spanish is useful with many assistants because they know Spanish much better than English. Spanish also is the “good friends” language that allows the Spanish speakers to freely catch up on each other’s affairs that motivates them to stay working at the hotel. The use of the Spanish language among cleaning assistants had been common practice among them for two years since the hotel opened.

In the last few months, top management decided to have an even greater focus on customer service by ensuring customer comment cards are available in each room and at the front desk. Customers also can comment about their stay at the hotel online.

There have been several customer complaints that cleaning assistants have been laughing about them behind their back in Spanish. One customer, Kathy, thought that staffers negatively commented about her tight pink stretch pants covering her overweight legs. Other customers have complained they didn’t think asking staff for help was easy given the amount of Spanish spoken. In all, about 15 out of 42 complaints in a typical month were associated with the use of the Spanish language.

Though Bellhops and front desk clerks are typically the workers who handle complaints first, Erica, the human resource manager, has the main responsibility to notify workers about customer complaint patterns and to set policy in dealing with the complaints. The prevalence of complaints concerning workers speaking Spanish each month led Erica to make a significant change in policy concerning the use of Spanish. In consultation with top management, Erica instituted the following employee handbook policy effective immediately:

“English is the main language spoken at the hotel. Any communication among employees shall be in English. Use of Spanish or other languages is prohibited unless specifically requested by management or the customer.”

In an e-mail explanation for the new policy, Erica stated the number of complaints that had come from the use of Spanish and the need for customer courtesy and communication.

Rachel immediately responded to Erica’s e-mail by stating that the new policy was too harsh on the native Spanish speaking assistants at the hotel. She thought that a better policy is to allow her assistants to communicate with each other through Spanish but by quietly doing so away from customer earshot. If there is a general discussion in front of a customer, it is recommended to speak English. There should never be discussions in any language about customer appearances.

Though Rachel grumbled, the policy stuck because Erica and top management wanted to stop customer complaints. As a result of the policy, ten of the twenty Spanish speaking assistants quit within two months. These were high quality assistants who had been with the hotel since the start. Their replacements came from a job service and have not worked out as well in their performance.

Questions and Answers

  1. What law(s) do you think might apply in this case?

  2. Should a complete ban of Spanish be instituted among staff of the hotel unless customers use Spanish themselves or should the use of Spanish be completely allowed by staff among themselves as long as it is quiet (why or why not)?

  3. What rules, if any would you put into effect in this situation, knowing about the customer complaints? Explain your answer.

    In: Operations Management

    Job-specific human capital. In this problem, based on a simplified version of the model in Bhattacharya...

    1. Job-specific human capital. In this problem, based on a simplified version of the model in Bhattacharya and Sood (2006), we will explore how linking employment and health insurance provision can (partially) solve the adverse selection problem if the labor market is competitive. Suppose that there are two types of workers – sickly workers with probability ps of falling ill over the course of the next year, and robust workers with probability pr < ps of falling ill. Employers cannot observe whether a worker is sickly or robust, and because of U.S. law they can only decide to offer health insurance to allof their workers, or none at all. We will assume that a just-hired employee is less productive than an employee who has more experience; let MPn be the marginal value product of new employees, and MPe > MPn be the marginal value product of experienced employees. In this simple model, marginal value product depends only on experience, not on whether a worker is sickly or robust.

    1. Consider an employer deciding whether to hire a new employee who will produce a marginal value product of MP. If the employer offers income and no health insurance, what wage, w, will the employer have to pay the employee in a competitive labor market? What would happen if the employer offered the employee less? What would happen if the employer offered the employee more?

    ANS.

    1. D is a measure of job-specific human capital; as workers learn the job, they become more productive so D > 0. However, not every job or industry has the same value for D. In some lines of work D is low, while in others D is high, simply because of the nature of the work. Given the results you have seen in this problem, in which types of industries – high-D or low-D – would you expect there to be a larger fraction of employers offering pooled health insurance to workers?

    ANS.

    In: Economics

    Human blood is grouped into four types: A, B, AB and O. The percent of all...

    Human blood is grouped into four types: A, B, AB and O. The percent of all Americans with each type of blood are as follows: O: 43%, A: 40% B: 12% and AB 5%. At a recent blood drive, the number of donors having different blood types are shown below:

    O                A                B                 AB

    60               65               15               10

    1. The total sample size in this blood drive is: a. 125       b. 140          c. 150

    2. The expected value (based on the information about the blood types for all Americans) of people having O type of blood in the blood-drive sample is: a. 60   b. 64.5 c. 67   

    3. The expected value (based on the information about the blood types for all Americans) of people having A type of blood in the blood-drive sample is: a. 60 b. 65     c. 67

    4. The expected value (based on the information about the blood types for all Americans) of people having B type of blood in the blood-drive sample is: a. 10   b. 15 c. 18

    5. The expected value (based on the information about the blood types for all Americans) of people having AB type of blood in the blood-drive sample is: a. 7.5 b. 10   c 15

    6. The standardized test statistic value that is calculated by comparing the four observed values of the different blood types from the blood-drive sample with the four expected values is: a. 1.06   b. 2.06 c.3.06

    7. The probability value of the event that the standardized test statistic would assume a value as large as that calculated in question 6 is:   a. 0. 36            b. 0.46      c. 0.56

    8. By comparing the probability value calculated in question 7 to a 5% level of significance in a hypothesis test we fail to reject the statement:      a. There is no difference between the proportions of people having different blood types in the blood-drive sample and the proportions of all Americans having different blood types    b. There is a positive difference between that the proportions of people having different blood types in the blood-drive sample and the proportions of all Americans having different blood types   c. There is a negative difference between the proportions of people having different blood types in the blood-drive sample and the proportions of all Americans having different blood types.

    In: Statistics and Probability

    Select one major aspect of human physiology in the selected readings for this module that particularly...

    Select one major aspect of human physiology in the selected readings for this module that particularly interests you. Analyze and evaluate it, then creatively apply it to aviation safety. Explain both how and why you believe it could negatively impact safety in some aspect of aviation operations that also particularly interests you, such as flight operations, maintenance operations, or air traffic control operations.

    In: Mechanical Engineering

    you are the leader of your country's space agency, and you want to establish a human...

    you are the leader of your country's space agency, and you want to establish a human colony on the Moon. One of your advisers proposes to create (an) atmosphere on the Moon by "siphoning" off some of the air from the Earth's atmosphere and releasing it on the Moon. That way the colonists would be able to move around freely on the surface of the Moon without having to wear space suits and oxygen tanks.

    Good idea or bad idea? Discuss and explain. (Stick to physics principles; do not worry about technical difficulties or cost of transporting the air.)

    In: Physics