A student was wondering whether spending a great deal of time on a test is worthwhile,...

A student was wondering whether spending a great deal of time on a test is worthwhile, so he obtains results from a sample of 10 previous students and conduct a linear regression analysis. The results appear below.

Model Summary
Model	R	R Square	Adjusted R Square	Std. Error of the Estimate
1	.814^a	.662	.620	7.38577
a. Predictors: (Constant), Time (min)

ANOVA^a
Model		Sum of Squares	df	Mean Square	F	Sig.
1	Regression	854.624	1	854.624	15.667	.004^b
	Residual	436.397	8	54.550
	Total	1291.021	9
a. Dependent Variable: Grade (%)
b. Predictors: (Constant), Time (min)

Coefficients^a
Model		Unstandardized Coefficients		Standardized Coefficients	T	Sig.
		B	Std. Error	Beta
1	(Constant)	25.584	13.032		1.963	.085
	Time (min)	.407	.103	.814	3.958	.004
a. Dependent Variable: Grade (%)

Is there a significant linear association between time spent on the test and the grade? How do you know?

What percentage of variation in grade is explained by its relationship with time spent on the test?

If a student turned in her test after 100 minutes, predict her score.

A freshman who didn't take the course yet asks about the results from part a: “So, explain this to him / her. Does this mean that if a student wait and turn in the test at the last minute, he / she is going to get a good grade?” Respond as a competent biostatistician, based on your results and your understanding of the conceptual basis of the analysis.

Expert Solution

orchestra answered 1 year ago

A state's spending policies reflect its political philosophy and reveal a great deal about how well...

A state's spending policies reflect its political philosophy and reveal a great deal about how well the state budget provides for the needs of all of its citizens. How effective are Texas spending processes? What Philosophy do they represent? Overall, would you say that the budget reality reflects the ideal of democracy?

ATT&T and Time Warner (Spectrum) has been viewed a great deal since it may have great...

ATT&T and Time Warner (Spectrum) has been viewed a great deal since it may have great benefits for customers. But the critics of such merger claim that this deal will hurt customers. Should the Government approve this merger? Provide your arguments or against the deal.

MAN4402 1. Legally, it makes a great deal of difference whether someone performing work is an...

MAN4402 1. Legally, it makes a great deal of difference whether someone performing work is an employee or an independent contractor. But should it make a difference? What is the justification for excluding independent contractors from protection of antidiscrimination and other laws?

Many believe that jobs in the US have changed a great deal over time. In two...

Many believe that jobs in the US have changed a great deal over time. In two time periods (1989 and 1998) adults in the US were asked about their jobs on the General Social Survey. Respondents were asked how much they agree with the following statements: my income is high; my job is secure; my opportunities for advancement are high; my job is interesting; I can work independently. Higher numerical responses reflect greater agreement with each statement (1=strongly disagree, 2=disagree,...

1) Do you understand that accounting departments spend a great deal of time at the end...

1) Do you understand that accounting departments spend a great deal of time at the end of the month and even more on end of year. why would this be true? 2) Time Value of Money is a complex concept. Why do we worry about it in Accounting.

Like motivation theories, one could spend a great deal of time looking at Leadership Models. Using...

Like motivation theories, one could spend a great deal of time looking at Leadership Models. Using the internet and a search engine, learn about each of these and provide a description in a short paragraph. A. Reddin 3-D Leadership Model B. Blake and Mouton’s Managerial Grid C. Likerts Systems of Management D. Tannenbaum and Schmidt Continuum Theory

A student is curious whether taking a test in the same room as the lecture will...

A student is curious whether taking a test in the same room as the lecture will influence test performance. To test this she selects 30 students at random and assigns them randomly to two groups. Group 1 takes their test in a new classroom environment. Group 2 takes their test in the same room as the class lectures. The student thinks that taking the test in the same room as the lecture will improve performance. At a conservative 1% significance...

There is a great deal of strategy and research that goes into the marketing process, but...

There is a great deal of strategy and research that goes into the marketing process, but at the end of the day, marketers ultimately strive to build a brand that creates sustainable customer relationships that bring value to both the customer and the business. You should be starting to think of yourself as a brand in order to create a competitive advantage in the modern workplace. Today, there is a lot of talk about personal branding and every career minded...

The reactivity of a combination of monomers depends a great deal on the nature of the...

The reactivity of a combination of monomers depends a great deal on the nature of the polymerizing center. For example, the reactivity ratios of butadiene (1) and styrene (2) are quite different in an anionic copolymerization (r1 = 5, r2 = 0.04) and in a radical copolymerization (r1 = 1.39, r2 = 0.78). If a copolymerization is performed with a 50/50 mixture of the two, what are the initial compositions of the polymers formed in the two different copolymerization reactions?

Omnicom Group is considering spending $350,000 at Time 0 to test a new product. Depending on...

Omnicom Group is considering spending $350,000 at Time 0 to test a new product. Depending on the test results, the company may decide to spend $786,000 at Time 1 to start production of the product. If the product is introduced and it is successful, it will produce aftertax cash flows of $654,000 a year for Years 2 through 5. The probability of successful test and investment is 60 percent. What is the net present value at Time 0 given a...

Question