1. Mechanical engineers have investigated the performance of the males in assembling   aircraft hydraulic systems compared to females technicians. Random samples of 7 males and 7 females technicians were chosen to assemble similar hydraulic systems. The following table shows the data in minutes.

1. At the 5% significance level, can you conclude that males’ performance is higher than that of the females?
2. Construct a 95% confidence interval for the difference of the two means.

1a. What is the largest negative number that you could represent with 7 bits using signed magnitude? Show your work.

1b. What is the largest positive number that you could represent with 7 bits using 2’s complement? Show your work.

1c. Add the following two binary numbers 10110111 + 1011 = :Show your work.

1d. Solve the following decimal notation equation using 8-bit binary numbers and 2’s complement notation: 69 - 7 = :Show your work

You are a wealth management analyst, and your first job is to make investment recommendations to a client.

After extensive research, you have narrowed down to the following two companies: XiG, pronounced as “eleven groceries”, is a grocery store chain operated in the U.S, with major competitor such as convenience store Seven-Eleven. XiG has very stable consumer base and its business is not very sensitive to the business cycle of the general economy.

TanW, acronym for Tan-my- way, is a beauty salon chain with a focus on tanning services. Its business is quite affected by the business cycle since people tend not to splurge on expensive non-necessities such as tanning spas.

Your client’s current portfolio has an expected return of 6% per year. Based on some economic models, you are confident to simplify the analysis as follows: Suppose there are five possible states of the economy each with equal probability. Here is a table of the returns (unit: %) corresponding to each state. This table facilitates your recommendation decisions:

Which firm has a higher expected return and Which firm is riskier?

In Lima one worker can produce either 20 bushels of corn of 5 pounds of tomatoes in one day. In Puma one worker can produce either 53 bushels of corn or 7 pounds of tomatoes in one day. The country that specializes in tomato production is willing to sell one pound of tomatoes for at least how many bushels of corn? Round to two decimal places.

A large supermarket carries four qualities of ground beef. Customers are believed to purchase these four varieties with probabilities of 0.13, 0.27, 0.14, and 0.46, respectively, from the least to most expensive variety. A sample of 480 purchases resulted in sales of 48, 148, 74, and 210 of the respective qualities. Does this sample contradict the expected proportions? Use α = 0.05.

(a) Find the test statistic. (Round your answer to two decimal places.)


(ii) Find the p-value. (Round your answer to four decimal places.)

A program for generating random numbers on a computer is to be tested. The program is instructed to generate 100 single-digit integers between 0 and 9. The frequencies of the observed integers were as follows. At the 0.05 level of significance, is there sufficient reason to believe that the integers are not being generated uniformly?

(a) Find the test statistic. (Round your answer to two decimal places.)


(ii) Find the p-value. (Round your answer to four decimal places.)

I don't understand the question..what method?

Scenario: Prior to Opening, Part I: You plan to open a pet-services business that will offer dog grooming, day care, and boarding. You can be creative in deciding the name of your business (e.g., “Inspiring Dog Care”), its geographical location (e.g., Chicago), and its mission and vision for adding value to the community. You will be asked to make choices for a few other details to customize your case; otherwise, you should use the information below.

There are 12 kennels (single dog only) and the day care area can house 10 large dogs and 12 small dogs each day. The grooming facility is 200 square feet, the boarding facility is 2,500 square feet, and the day care is 1,500 square feet. Your groomer can groom five dogs a day for five days a week; each groom consists of 1.5 labor hours. You also offer dog day care six days a week, and kenneling every day. You have taken out a loan for start-up costs and the monthly payment is $420; it goes into effect immediately and should be accounted for in your costs. With limited cash contribution and loan funding, you located two angel investors. You will collect a modest draw for the first year of $600 a month; remember to divide evenly among the services.

Note: For simplicity, base all calculations using 30 days in each month. You have hired the following people:

A groomer, Allison, who will be paid $12/hour and work 40 hours a week

A day care attendant, Beverly, who will be paid $9/hour and will work based on need

A receptionist, Cathie, who will be paid $8.50/hour and work 30 hours a week

A kennel attendant, Ben, who will be paid $11.50/hour and will work based on need

A complete list of additional costs is provided below:

Food and water bowls: $3.59/unit
o Daycare: Two bowls last for every 75 dogs that attend daycare.
o Boarding: Two bowls last for every 100 dogs that are boarded; you need two bowls per kennel. o Grooming: Each bowl lasts for 20 grooms and you need four bowls at all times.

Fencing for daycare area: $1,249; installation of fencing: $1,000

Dog grooming arm: $300

12 kennels: $9,500; depreciation is $80/month

Rent: $650/month; allocate based on square footage

Utilities/insurance: $600/month; allocate based on square footage

Grooming table: $900

Grooming tub: $2800

Heating system: $10,000; depreciation is $83/month; allocate based on square footage

Clippers: $136.99; can be used for 100 grooms

Shampoo: $103.96 per five-gallon pail, which can be used for 100 grooms

Cage bank: $2200 per set of 5

Salon Tuff Capri mobile carry cart: $90

Towels: $34.99 per 12 pack

o Day care: You need to have 12 towels for every 25 dogs.
o Boarding: You need to have 12 towels for every 40 dogs.
o Grooming: You need to have two towels for every groom per day.

Scissors: (1) 7-inch straight is $194.99, and (1) ear-and-nose is $7.49; each can be used for 200 grooms.

Toys: $3.29 per 6-pack; one toy will last for two dogs in day care, per day.

Cleaning products:

o Odoban: $14.55/gallon: Each area will dilute 1 oz to 1 gallon of water; allocate based on square footage.

o Simple Green: $15.66/gallon: each area will dilute 1 oz to 1 gallon of water; allocate based on square footage.

Dryer: $1250

Rubberized flooring for day care: $3800

Problem:

Determine your per-unit cost per dog in the “Variable_Fixed”

8) Our company did a stock dividend. Dave says there is no effect on our comprehensive stockholders' equity at all. Barbara disagrees and says it does have an effect on equity but isn't sure exactly what. She just knows there is an impact. Verna has absolutely no clue on this one. So she just cannot decide who's right and is completely lost.

• Exactly what effect(s) would there be on the comprehensive stockholders' equity? Make sure you explain why.

Enter in excel formula

You are considering the purchase of one of two machines used in your manufacturing plant. Machine A has a life of two years, costs $95 initially, and then $140 per year in maintenance costs. Machine B costs $165 initially, has a life of three years, and requires $115 in annual maintenance costs. Either machine must be replaced at the end of its life with an equivalent machine. The discount rate is 12 percent and the tax rate is zero. Calculate the EAC. Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places. EAC Machine A $ Machine B $ Which one should you choose? Machine A or Machine B

(In table below, row one is row 7 in assignment excel sheet . Tax rate is row 14)

Column C Column D

Complete the following analysis. Do not hard code values in your calculation. Do not round intermediate calculations.

Column D Column E

EAC_a

EAC_b

choice

The following data give the ages (in years) of all six members of a family 8 10 12 50 55 69

a. List all the possible sample of size two (without replacement) that can be selected from this population. Calculate the mean for each of these samples. Write the sampling distribution of sample mean.

b. Compare the mean of a population probability distribution with that of a sampling distribution.

c. Compare the dispersion in the population with that of the sample means.