QUESTION 1 :

Fertilizer is sold in bags. Weights of fertilizer in bags are normally distributed. The actual mean weight of a bag is found to be 20 kg. 27 bags were randomly selected, piled on a pallet and weighted. Those 27 bags had a mean of 20.87 kg and a standard deviation of 0.34251 kg. If the variance of weight is less than 0.1225 no adjustment is made. Otherwise, the machine is adjusted.

1. Calculate a 99% confidence interval on the variance of weights. Interpret your result.

2. Do you think that the machine needs adjustment? Use a = 0.05.
   1. Formulate the hypotheses.
   2. Write test statistics and calculate its value.
   3. Find critical value and write rejection criteria.
   4. Write your conclusion.
   5. Calculate appropriate confidence interval to test the claim. State your result and draw your conclusion about the hypothesis.

Case study 1

Steve works for a software company in Los Angeles. His Company is his life. The job meets his personal goals and expectations perfectly, and Steve believes he has grown greatly as a person. His work is appreciated and it is recognized; he has received three promotions and many more pay increases. Steve also likes the Company itself. Although Steve is the oldest and only foreigner in a company, he has never felt like that. Moreover, Steve’s colleagues used to teach him English grammar that Steve didn’t know very well. His colleagues are his friends. They spend almost every weekend together fishing, having fun, or solving complex problems with their top manager. He has a great relationship with his manager. For example, they organized special training together for employees in IT, which was Steve’s expertise and his true love. Steve’s manager spends most of his time exchanging routine information and processing paperwork while writing software programs is a routine for Steve. When his Company got the reward “The Best Company 2018” by customers, Steve was very happy and proud, so he decided to design a special team building game as a mark of appreciation. Team Building game “Our Company– Our family” is the product of Steve’s imagination and creativity and positive personality traits.

Q1 Explain in detail how Steve’s manager could be more successful based on F. Luthans management styles (the answer should be the composition of two parts: theoretical and practical explanation).

Q2A. Based on the knowledge about attitudes in general, its components, and job attitudes, explain in detail Tony’s attitude toward his job. (the answer should be the composition of two parts: theoretical and practical explanation

Q2B. Analyze the impacts of job attitudes on organizational performance

Case study 2

John Hashop, director at Fly High Regional Flight Company, stared at a wall in his office. It was yet another day filled with complaints from his workers, especially flight attendants, mostly centered around their compensation. For the last few weeks, he had been nagged with worries about the effectiveness of the management system, which had been implemented under his leadership over the last year. He knew that discontent was brewing among them, especially, the modification of the special incentive scheme, which was designed to boost productivity, seemed to be a sore point. He had been thinking about what could be done to keep the flight attendants motivated and satisfied.

Q3. What should John do in response to the challenges he faces? Based on knowledge about the main causes of job satisfaction, explain what John should do to increase job satisfaction among especially flight attendants?

[Red Cross Red Shield] The distribution of the amount paid in health claims by Red Cross Red Shield (RCRS), a medical insurance company, on individual health insurance plans for college students has mean $500, median $400, and standard deviation $550.

Consider the variation of the amount paid of a sample of 40 plan members. Do you think that the standard deviation of the sample mean of participants (Stdev[ ]) is smaller than, larger than, or equal to the standard deviation of individual annual amount paid? Why?

1) What is inflation?

2) What is deflation?

3) What is the Consumer Price Index?

Use the following table to solve questions 4-7: https://inflationdata.com/Inflation/Consumer_Price_Index/HistoricalCPI.aspx?reloaded=true#Table (Links to an external site.)

4) Michael went to AMC theaters and paid $12.00 for a movie ticket. However, he wants to know what the price of a movie ticket would be in 1990?

5) Joanne is pumping gasoline at ExxonMobil and saw that the price is $3.39 per gallon. She is curious to see if she is overpaying or underpaying today. Gasoline prices in the 1980s were $1.03 per gallon. How much should a gallon of gasoline be today?

6) Jerry works at Jamba Juice and gets paid California state minimum wage. However, in the 1970s, the minimum wage was $1.60 per hour. Is Jerry better or worse off today compared to the California state minimum wage? How about compared to the federal minimum wage of $7.25?

7) Barbara is a Toyota fan and remembers in 2000 the price of a Camry was priced $26,198. She is wondering if the price of a Camry is about the same based on inflation? What should the price of a new Toyota Camry be today?

I need numbers 5,6 and 7.

Show all work and answer steps in complete sentences please list them ex. Step 1 underline steps

Use a two-tailed test and α = .05.
Round up to two decimal places.

Dependent t-test
We want to test exercise on stress. A sample of participants reported their stress levels before and after exercising?Conduct four steps of hypothesis testing.

Before      After                   D
25              10                     15
25              17                      8
21              15                      6
25              14                     11

SSD = 46

Step 1 State your NULL and RESEARCH hypotheses completely
Step 2 What is the df?
Step 3 What are the cut-off points?
Step 4 What is the standard deviation of the D scores?
Step 5 What is the estimated standard error?
Step 6 What is the t-value?
Step 7 State your conclusion thoroughly.

Use a two-tailed test and α = .05.
Round up to two decimal places.

Independent t-teest
We want to compare the q scores between morning students and afternoon students. Is there a significant difference between two groups on the q scores? Conduct four steps of hypothesis testing.

AM       PM
8            7
7          1
9          1
6          8
3            8
9           11

SS for AM= 26
SS for PM = 84
Step 1 State your NULL and RESEARCH hypotheses completely.
Step 2 What is the df?
Step 3 What are the cut-off points?
Step 4 What is the pooled variance?

Step 5 What is the estimated standard error?
Step 6 What is the t-value?
Step 7 State your conclusion thoroughly.

Consider a particle which is constrained to move along the surface of the sphere of radius 5, centered at the origin.

(a) If we write r(t) for the motion, write down the condition ‘constrained to move along the surface of the sphere of radius 5 centered at the origin’ in terms of r(t). (Hint. For later use, try to get rid of square roots.)

(b) Explain why, for such a motion, we must have r 0 (t) ⊥ r(t). (Hint. Differentiate your answer from the previous part.)

(c) What can you say about the acceleration? (Hint. Differentiate your answer from the previous part. Draw a picture.)

The thermodynamic properties of foods can be discussed in terms of the enthalpy of combustion per gram of food. Do you get more energy from the metabolism of one gram of sugar or one gram of fat? Answer this question quantitatively and with as much thermodynamic detail as possible. Use two of the following three methods to quantify your answer: (A) arithmetic method, (B) calorimetry, and/or (C) computational.

If you leave in Northern Florida that the annual average temperature outside changes on the minimum to 40 F and Summer to 80 F, to save energy, is it better to turn off your water heater and turn it on 1 hour before shower or use, or let it to be on all the time. The water set temperature is normally around 110 F. Show with detail calculations if there is any energy saving.

Oxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, whereas deoxygenated hemoglobin has the opposite absorption. This fact is used in a "pulse oximeter" to measure oxygen saturation in arterial blood. The device clips onto the end of a person's finger and has two light-emitting diodes—a red (632 nm) and an infrared (930 nm)—and a photocell that detects the amount of light transmitted through the finger at each wavelength.

(a) Determine the frequency of each of these light sources.

red Hz

infrared Hz

(b) If 66% of the energy of the red source is absorbed in the blood, by what factor does the amplitude of the electromagnetic wave change? Hint: The intensity of the wave is equal to the average power per unit area as given by I = Emax2 2μ0c = c 2μ0 Bmax2.