1. Researchers wanted to see how two new varieties of fish food compare to a commonly...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
1. Researchers wanted to see how two new varieties of fish food compare to a commonly used food. They took 180 similar fish and assigned them randomly to three different tanks. The fish in tank 1 received one variety of new food, the fish in tank 2 received the other variety of new food, and the fish in tank 3 received the commonly used food. The growth and health of the fish was measured over a period of 4 weeks. a. Was this an experiment or an observational study? Explain briefly. b. For each of the principles of experimental design (Control, Randomize, Replicate, and Block), say whether it is present in this scenario. Explain briefly. c. Can this study be done in a double-blind way? Explain. 2. A community college wants to collect opinions from its students on campus transportation issues, such as bus service and parking. Of the total 5000 students in the college, 500 live on campus, 1000 don't regularly come to campus during the day (taking only evening or online classes), and the remaining 3500 have classes on campus at least one day each week. a. Why might the college want to use a stratified random sample? b. The college asks you to select a stratified random sample of 200 students. How many of each type of student will you select? 4. On March 30, 2023, Pew Research Organization released the results of a survey. They asked a group of 10,701 U. S. adults their opinion of the Central Intelligence Agency (CIA). The possible responses were Very Favorable, Somewhat Favorable, Very Unfavorable, Somewhat Unfavorable, Not Sure, and No answer. a. Clearly identify the population in this situation. b. Clearly identify the sample in this situation. c. Clearly identify one population parameter of interest in this situation. 1. Researchers wanted to see how two new varieties of fish food compare to a commonly used food. They took 180 similar fish and assigned them randomly to three different tanks. The fish in tank 1 received one variety of new food, the fish in tank 2 received the other variety of new food, and the fish in tank 3 received the commonly used food. The growth and health of the fish was measured over a period of 4 weeks. a. Was this an experiment or an observational study? Explain briefly. b. For each of the principles of experimental design (Control, Randomize, Replicate, and Block), say whether it is present in this scenario. Explain briefly. c. Can this study be done in a double-blind way? Explain. 2. A community college wants to collect opinions from its students on campus transportation issues, such as bus service and parking. Of the total 5000 students in the college, 500 live on campus, 1000 don't regularly come to campus during the day (taking only evening or online classes), and the remaining 3500 have classes on campus at least one day each week. a. Why might the college want to use a stratified random sample? b. The college asks you to select a stratified random sample of 200 students. How many of each type of student will you select? 4. On March 30, 2023, Pew Research Organization released the results of a survey. They asked a group of 10,701 U. S. adults their opinion of the Central Intelligence Agency (CIA). The possible responses were Very Favorable, Somewhat Favorable, Very Unfavorable, Somewhat Unfavorable, Not Sure, and No answer. a. Clearly identify the population in this situation. b. Clearly identify the sample in this situation. c. Clearly identify one population parameter of interest in this situation.
Expert Answer:
Answer rating: 100% (QA)
1 a This was an experiment An experiment involves intentionally changing one or more variables to observe the effect on the subjects In this case the ... View the full answer
Related Book For
Posted Date:
Students also viewed these mathematics questions
-
what is an examples of Human Factors in Aviation Safety? what is a human factor in Boeing 737 Crash in Russia Flight U9 363? 300 words for each answers please cite your source at the end
-
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...
-
Planning is one of the most important management functions in any business. A front office managers first step in planning should involve determine the departments goals. Planning also includes...
-
Identify the five number summary for the following data set: 35 24 54 2 36 23 16 43 59 55 28 81
-
Four years ago, Guard Co. sold a 20-year bond issue with a 7% annual coupon rate and a 9% call premium. Today, Guard Co. called the bonds. The bonds originally were sold at their face value of...
-
The value of a firm is the maximum present value of its possible cash flow streams. This can be expressed as \[ V_{0}=\max \left[x_{0}+\frac{x_{1}}{1+s_{1}}+\frac{x_{2}}{\left(1+s_{2}...
-
List the advantages and disadvantages of owning a residence.
-
Data collected on the yearly demand for 50-pound bags of fertilizer at Wallace Garden Supply are shown in the following table. Develop a 3-year moving average to forecast sales. Then estimate demand...
-
Hillyard Company, an office supplies specialty store, preparesits master budget on a quarterly basis. The following data havebeen assembled to assist in preparation of the master budget forthe firs 2...
-
1. The following table shows the unit shipping cost between cities, the supply, demand and the destination city. Use the Minimum Cost Method to find the initial solution (or BFS) and then find the...
-
Based on the following information, Salaries and Wages: $18,944 Utilities: $4,726 Net Rental Income: $262,968 Real Estate Taxes: $28,273 General & Administrative: $18,921 Other Income: $15,435...
-
One year ago Security Mortgage originated a $95,000, 25-year, fixed-rate mortgage at 7.25 percent interest. Today, the market interest rate for similar mortgages is 6.75 percent. The loan is expected...
-
ABC Ltd gives you the following information. You are required to prepare a Cash Flow Statement by using Indirect Method as per AS-3 for the year that ended on 31 March 2004: Balance Sheets as...
-
Betty died on May 1, 2023 and had the following assets and expenses. Betty was not married. What is the estate taxable value for each item? Checking account in her name with a $4,500 balance Savings...
-
You are a professional accountant working as an Accounts Officer of Oman Trading Company. Oman Trading Company a partnership firm specializing in the import and export of a wide range of goods,...
-
Review the Competency 2 Resources: The Roles of Government in the Economy . Analyze 1 of the following government intervention programs: U.S. agriculture support programs Assistance for low Income...
-
Discussion: Hurricane Katrina The federal government's role in Hurricane Katrina played a significant role in the response and relief efforts; however, there was both success and failure. Some of...
-
Reconsider Prob. 1474. In order to drain the tank faster, a pump is installed near the tank exit as in Fig. P1475. Determine how much pump power input is necessary to establish an average water...
-
Search on the Internet for discussions that distinguish an interview from an interrogation.
-
Find the Panel on Audit Effectiveness report by the Public Oversight Board (August 31, 2000) and outline the panel's major recommendations concerning forensic techniques (pp. 1 and 2).
-
Suppose you are fired because you would not "cook the books." Do you have any regress? Check out some whistle-blowers websites, especially the Office of Special Counsel.
Study smarter with the SolutionInn App