Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

A company advertises that by using their SAT math prep class, students can increase their score by at least 50 points, A teacher is skeptical of this claim. Suppose mu represents the actual mean increase in math SAT scores of the population who have used the method and assume the distribution of their scores is approximately normal. The teacher collects a data sample of 16 students who took the class to see if the claim is true. The mean increase of scores is 45 points with a standard deviation of 20 points. Is this data enough evidence that the mean improvement is less than 50 points?

H0:mu = 50

H1:Amu< 50

-The above data are the differences in SAT scores obtained by a student before the training and after the training. What is this an ex of?

-What are the appropriate degrees of freedom for this test?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M944790

Have any Question? 


Related Questions in Statistics and Probability

In randomized double-blind clinical trials of a new vaccine

In randomized, double-blind clinical trials of a new vaccine, monkeysmonkeys were randomly divided into two groups. Subjects in group 1 received the new vaccine while subjects in group 2 received a control vaccine. After ...

In march 2010 a federal health-care law required chain

In March 2010, a federal health-care law required chain restaurants with 20 or more locations to post caloric information on their menus. The stated goal was to make it easier for consumers to select healthier options, b ...

The 1930s and the great depression with the complete

The 1930s and the Great Depression: With the complete collapse of the American economy, the people of the United States explored many possible solutions and then settled on one. What are all of the options that were in p ...

Researchers use hierarchical regression cross-lagged panel

Researchers use hierarchical regression, cross-lagged panel designs, and structural equations modeling to partly resolve the problems associated with inferring causality from correlation. a. Describe how each of these an ...

The two-person game shown in table 1 has a unique nash

The two-person game shown in Table 1 has a unique Nash equilibrium (see Moulin and Vial, 1978) in which each player's expected payoff is 3.

Prove that if player i believes at the state of the world

Prove that if player i believes at the state of the world ω that the state of the world is consistent, then he believes that every player believes that the state of the world is consistent. Deduce that in this case playe ...

Focusing on leadership and changeintroductionin this

Focusing on leadership and change Introduction In this assignment, we will focus on you, your relationship to leadership and change in your work context and the management ideas that have influenced those topics. Rather ...

Explain how the picture below helps us understand

Explain how the picture below helps us understand Christianity. Who were the thinkers that used these philosophers to understand their faith?

Net exports are calculated by subtracting imports from

Net Exports are calculated by subtracting Imports from Exports. Assume Exports and Imports are independent of one another.  If mean exports are $25M with a standard deviation of $3.5M and mean imports are $30M with a sta ...

The question to address is what have you learned about

The question to address is: "What have you learned about statistics?" In developing your responses, consider - at a minimum - and discuss the application of each of the course elements in analyzing and making decisions a ...

  • 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