For each of the following three questions, answer: (a) what is the IV? (b) what is...

For each of the following three questions, answer: (a) what is the IV? (b) what is the DV? (c) what are the scales of measure for each variable? (d) what are the null and alternative hypotheses (you can assume each is a two-tailed test)? An educational researcher randomly assigns fourth-grade students to receive a new after-school math program or to receive the standard after-school math program; she then measures how well they all do on a math test (where 0 indicates they got none of the questions correct).

Solutions

Expert Solution

a. The independent variable is receiving after school math program.

The dependent variable is scores in math test.

The independent variable is measured in nominal scale since the outcome is binary (either math program is received or it is not).

The dependent variable is measured in ratio scale as it is a continuous random variable.

The null hypothesis is that the average score in the math test is same for both students receiving math program and those who don't. The alternative hypothesis is that the scores are not equal.

b. The dependent variable is the height of college students.

The independent variable is the family to which a student belongs.

The dependent variable is measured in interval scale.

The dependent variable is measured in nominal scale as there are only two possible outcomes: large family and small family.

The null hypothesis is that the average height of the students coming from small family is same as large family. The alternative hypothesis is that the heights are not equal.

c. The dependent variable is the resting heart rate.

The independent variable is whether an individual is receiving the particular drug.

The dependent variable is measured in ratio scale.

The independent variable is measured in nominal scale.

The null hypothesis is that the heart rate of individuals who have been assigned to take a drug is same as for individuals who don't take the drug. The alternative hypothesis is that their heart rates are different.

orchestra answered 1 year ago

Next > < Previous

Related Solutions

8. Use the following table to answer questions I, ii, iii and iv A B C...

8. Use the following table to answer questions I, ii, iii and iv A B C Initial cost $15,000 $9,000 $12,000 Annual benefit $8,000 $2,000 $1,800 Salvage value $5,000 $9,000 0 Life in years 2 years 3 Years Infinity MARR 10% i. The NPW of alt. A is __________________. A) $13,420 B) $17,380 C) $11,000 D) $6,00 ii. The NPW of alt. B is __________________. A) $13,420 B) $17,380 C) $11,000 D) $6,000 iii. The NPW of alt. C is...

For each of the scales shown below (A, B, and C), answer the following questions: What...

For each of the scales shown below (A, B, and C), answer the following questions: What type of data is being collected? What level of scale measurement is being used? What is the most appropriate measure of central tendency? What is the most appropriate measure of dispersion? What weakness, if any, exists with the scale? A. How do you pay for your travel expenses? Cash , Company , charge , Check , Personal charge , Credit card , Other B....

Answer the following questions for each of the three situations outlined below: What is the good...

Answer the following questions for each of the three situations outlined below: What is the good or service being consumed? Does its consumption create externalities? If so, what they are and are they positive or negative? If the example involves externalities, identify who creates the externality and who benefits or suffers from it. #1--Antibiotics are becoming less effective as bacteria evolve, a process accelerated by overuse of antibiotics by doctors. Nevertheless, a “survey of physicians showed they were most likely...

Section IV. Please answer three of the following questions in 5-6 lines (100 words) (7X3 =...

Section IV. Please answer three of the following questions in 5-6 lines (100 words) (7X3 = 21 points) a. What is data integrity, and what is the significance of a lack of data integrity? b. What is the difference between controlled and uncontrolled redundancy? c. What is the difference between logical and physical data independence? d. Why is it useful to know all the candidate keys of a relation schema? e. What is the difference between a desirable and an...

Ideal gases! For each of the following three scenarios, a-c, answer the following three questions I-III....

Ideal gases! For each of the following three scenarios, a-c, answer the following three questions I-III. (This means there are NINE TOTAL ANSWERS here.) Scenarios a. Two moles of ideal gas are reversibly heated from 250 K to 300 K at a constant volume of 5L. b. A mole of ideal gas is compressed reversibly from 100 L to 10 L at a constant temperature of 273 K. c. One mole of ideal gas is reversibly adiabatically expanded from a...

Answer two questions from the three below (750 words each question). Questions are: - In what...

Answer two questions from the three below (750 words each question). Questions are: - In what ways does the media misrepresent the nature of crime? - Violent crime can be a source of concern, but is it the most frequently occurring type of crime in society? - Is the risk of being a victim of violent crime evenly distributed throughout society? Exam responses will be in essay format and approximately 750 words each.

Each country must ask and answer three basic economic questions. Which of the following is NOT...

Each country must ask and answer three basic economic questions. Which of the following is NOT one of those basic questions? What goods and services will the country produce? Who in the country will get the goods and services that are produced? Where in the country will the goods and services be produced? What mix of resources (or inputs) will be used to produce the goods and services? Statement 1: Monopolies and oligopolies are examples of market failure. Statement 2:...

Answer the following questions: A- What is discretionary and non-discretionary fiscal policy? B- What are the...

Answer the following questions: A- What is discretionary and non-discretionary fiscal policy? B- What are the available tools of fiscal policy? C- What is monetary policy and who conducts it? D- What are the available tools of monetary policy? Using these introductory questions, present a detailed essay-type analysis, with all the information from a reliable source, of what consists of at least three fiscal policy incentives and one monetary policy incentive as a consequence of the COVID-19. In total, at...

Please give a careful but brief answer to each of the following questions. (a) What is...

Please give a careful but brief answer to each of the following questions. (a) What is a population? A population is the complete set of measurements from every individual of interest. A population is a subset of the complete set of measurements from every individual of interest. A population is a numerical descriptive measure of the complete set of measurements from every individual of interest. A population is a numerical descriptive measure of a subset of the complete set of...

Answer each of the following questions on the promise and peril of economic integration. What will...

Answer each of the following questions on the promise and peril of economic integration. What will a potential shift of the economic center of gravity from the traditional G-8 countries—Canada, United States, Japan, Germany, UK, France, Italy, and Russia (currently suspended over its annexation of the Crimea)—to the BRICS countries mean? Does it signal hope for a new wave of economic growth and new engines of regional prosperity to drive the global economy, or does it signal the fading importance...

Subjects