The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National Park) from 1870 to 1987. Let x₁ be a random variable that represents the time interval (in minutes) between Old Faithful eruptions for the years 1948 to 1952. Based on 9580 observations, the sample mean interval was x₁ = 61.8 minutes. Let x₂ be a random variable that represents the time interval in minutes between Old Faithful eruptions for the years 1983 to 1987. Based on 23,000 observations, the sample mean time interval was x₂ = 69.2 minutes. Historical data suggest that σ₁ = 8.49 minutes and σ₂ = 11.78 minutes. Let μ₁ be the population mean of x₁ and let μ₂ be the population mean of x₂.(a) Compute a 99% confidence interval for μ₁ – μ₂. (Use 2 decimal places.)

(b) Comment on the meaning of the confidence interval in the context of this problem. Does the interval consist of positive numbers only? negative numbers only? a mix of positive and negative numbers? Does it appear (at the 99% confidence level) that a change in the interval length between eruptions has occurred? Many geologic experts believe that the distribution of eruption times of Old Faithful changed after the major earthquake that occurred in 1959.

Because the interval contains only positive numbers, we can say that the interval length between eruptions has gotten shorter.Because the interval contains both positive and negative numbers, we can not say that the interval length between eruptions has gotten longer.     We can not make any conclusions using this confidence interval.Because the interval contains only negative numbers, we can say that the interval length between eruptions has gotten longer.

Organism 3

Field Notes: Specimen collected from shaded area along stream in South Cumberland State Park (Grundy County, TN)
Laboratory Analysis:
Body: Large leaves emerging from underground rhizome
Size: 63cm

Chromosomal Analysis: Plant body is diploid --chromosomes number of 44

Lignin test: Positive

Cuticle: Present

Leaves: Present -- large with branched veins. Underside has sori(containing haploid spores)
Roots: Present-----branch from the inside
Stem:Present--- vascular tissue(xylem and phloem)present



Life History: Diploid sporophyte dominant generation. Haploid spores germinate into heart-shaped, haploid, gametophyte. Water required for fertilization due to flagellated sperm; no seed is produced. Diploid zygote develops into sporophyte of life ---each bearing ether megasporangia or microsporangia but not both. Insects, especially beetles, appear important in pollination   

Question: Explain which domain, kingdom and phylum you believe this plant should be classified in.

Communication: The local media features the work of your team on their nightly news. During a live interview the reporter asks you " Apparently this plant requires water for fertilization, can you explain, can you explain why"?

Response: ------------------------

discuss the status of photovoltaic power plants in the United Status. Include in our discussion the power ratings of the solar power plants and their locations

Cite the references.

Currency crises in the United Kingdom and Hong Kong .

please give Suggestion and alternative while you are focusing on UK currency devaluation in the case given.  

You are the CEO of United Airlines and you have had a pretty difficult month. First, you kicked young women off of a plane because they were wearing yoga pants, then you forcefully dragged a doctor off a plane against his will. While your stock price has mostly rebounded, you a loss of value of $1 billion the day after the incident with the doctor. You know your organization needs a culture change. Apply Kotter’s 8-step model of change,to the United organization – what would be your strategy for remaking the organization? Be as specific as you can.

During this year’s COVID-19 outbreak the stock prices for the airline companies went down by huge margins. A day trader wants to invest in Airline stock and wants to learn how much interest is there in United Airlines. He wants to collect a random sample of investors.

The day trader wants to estimate the actual proportion of investors who would buy shares in United Airlines.

To calculate the required sample size, what value of p*p* should we use in the formula below to calculate a 90% confidence interval within 2.54 percentage points? Give exact answer as a decimal.

Many reasons for why the United Kingdom voted to leave the European Union have been proposed. A common one is that imports from the EU hurt low-skilled British workers. Suppose that there are two industries, financial services and manufacturing. Further assume that there are two factors of production, low- skilled and high-skilled workers, and that finance is high-skill intensive and manufacturing is low-skill intensive. Further assume that the United Kingdom is abundant in high-skill labour.

Describe also how the relative output of financial services versus manufacturing in the UK changes with Brexit. Explain your answer.

You are the CEO of United Airlines and you have had a pretty difficult month. First, you kicked young women off of a plane because they were wearing yoga pants, then you forcefully dragged a doctor off a plane against his will. While your stock price has mostly rebounded, you a loss of value of $1 billion the day after the incident with the doctor. You know your organization needs a culture change. Apply Kotter’s 8-step model of change,to the United organization – what would be your strategy for remaking the organization? Be as specific as you can.

1. The Sherman Act is a landmark federal statute:

A: That refuses to enforce the "yellow-dog", anti-union employment contract.

B: Fixing wage, hour and working conditions for most federal supply contracts in excess of $10,000.

C: On competition law passed by Congress in 1890. It prohibits certain business activities that reduce competition in the marketplace, and requires the United States federal government to investigate and pursue trusts, companies, and organizations suspected of being in violation.

D: Prohibiting featherbedding of the stand-by or make work types in the radio industry.

2. In Lyng v. International Union, United Automobile Workers, the Supreme Court upheld provisions contained in the federal Food Stamp Act that bar strikers and their families from participating in the food stamp program. It found this provision permissible for all of the following reasons except:

A: It contains an exception for strikes caused by the failure or refusal of an employer to conform to the provisions of an agreement or contract between employer and employee, or a law pertaining to hours, wages or other conditions of work.

B: It cuts federal expenditures.

C: It limits the use of limited food-stamp funds for those most in need.

D: It avoids providing "one-sided support" in labor strikes.

3. A "double-breasted" company:

A: May or may not constitute a single bargaining unit using the usual "community of interest" test.

B: Is one which is regulated by the Interstate Commerce Commission in as much it regulates the hours of service of interstate passenger and freight motor vehicle operators.

C: Is one which has a clear separation between a disestablished company-dominated union its "successor" which is required by the National Labor Relations Board.

D: Is one in which there is an indicia of interrelated operations, common management, common ownership, and centralized control of labor relations.

4. Garmon preemption is a labor law doctrine. This doctrine forbids or prohibits state and local regulation of activities that are actually or arguably protected by the:

A: Supremacy Clause in the second paragraph of Article VI of the Constitution.

B: Labor-Management Reporting and Disclosure Act of 1959.

C: Secondary boycott provisions contained in Section 303 of the Act.

D: National Labor Relations Act’s rules relating to the right of employees to organize and bargain collectively; or prohibited by provisions of the National Labor relations Act that govern unfair labor practices.

Under the new tax law passed in December 2017, individuals can deduct no more than a combined $10,000 of state and local property taxes and either sales or state income taxes from their federal taxes. Previously, individuals could deduct all of these items fully (up to a certain limit for very high-earners). News reports have focused on how these new provisions may disproportionately hurt taxpayers (depending on their individual situations) in high-tax states such as California. In a couple of short sentences, explain why taxpayers in high-tax states are hurt by this change as compared to taxpayers in low-tax states.