Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

To test the hypothesis that students who finish the exam first get better grades, Professor Hardtack kept track of order in which papers were handed in. The first 25 papers showed the mean score of 77.1 with standard deviation of 19.6, while the last 24 papers handed in showed mean score of 69.3 with standard deviation of 24.9. Is this significant difference at _ = .05?

a) Describe the hypotheses for a right-tailed test.

b) Obtain the test statistic and p-value assuming supposing equal variances. Interpret these results.

c) Is the difference in mean scores large enough to be significant?

d) Is it reasonable to assume equal variances?

e) Carry out a formal test for equal variances at _ = .05, showing all steps clearly.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M916867

Have any Question? 


Related Questions in Statistics and Probability

1 what is the difference between simple also known as

1. What is the difference between simple (also known as univariate and bivariate) regression and multivariate regression? A) Simple regression includes one independent variable, and multivariate regression includes more ...

Jim has weighted gpa of 384 his high school gpas are

Jim has weighted GPA of 3.84. His high school GPA's are normally distributed with a mean of 2.9 and a standard deviation of 0.5. Kim's high school uses unweighted GPA's and she has a GPA of 3.57. GPA's are also normally ...

Suppose there are three bills in a wallet one of the bills

Suppose there are three bills in a wallet. One of the bills is a $1 bill, one is a $5 bill, and the third is a $10 bill. You select two bills at random without replacement from the wallet, and note the value of the bills ...

The wall street journal ceo compensation study analyzed ceo

The Wall Street Journal CEO Compensation Study analyzed CEO pay from many U.S. companies with fiscal year 2008 revenue of at least $5 billion that filed their proxy statements between October 2008 and March 2009. The dat ...

Consider repair costs for car a and car b the mean repair

Consider repair costs for Car A and Car B. The mean repair cost for each is $500 per year. Which statistics about repair costs may play into your decision to purchase one of these cars? Which car would you choose? Explai ...

The western way of war thesis posits that western societies

The Western Way of War thesis posits that western societies throughout history have generally fought wars in fundamentally similar ways. The precise elements of the Western Way of War are described succinctly in Geoffrey ...

Research objectives to explore correlations between reward

Research Objectives To explore correlations between reward systems and team work attributes in the Saudi Arabian bank sector To explore relationships between reward systems and team work effectiveness in the Saudi Arabia ...

What is voter suppression in america write one page

What is voter suppression in America. Write one page explaining voter's suppression.

Two sets of chromium analyses were performed on water

Two sets of chromium analyses were performed on water samples from a stream that runs near a chromium plating plant:                  Before the spill                                After the spill Mean :           0.95 ...

You are playing blackjack in a casino the casino is using a

You are playing blackjack in a casino. The casino is using a single, 52 card deck. Shuffling the deck takes time. So rather than shuffling the deck after each hand, the casino deals three hands before shuffling. The used ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen