User Account

All Pages

Conducting a significance test

Assignment Help Business Management
Reference no: EM131466078

1. Part 1: What are the conditions for using the standard deviation formula when conducting a significance test? Be specific about p versus p-hat. 

Part 2: What are the conditions for approximating with a normal distribution?

2. In each of the following cases state whether or not the normal approximation to the binomial should be used for a significance test on the population proportion p. 

a. n = 10 and H0: p = 0.4. 

b. n = 100 and H0: p = 0.6. 

c. n = 1000 and H0: p = 0.996. 

d. n = 500 and H0: p = 0.3.

3. Leroy, a starting player for a major college basketball team, made only 38.4% of his free throws last season. During the summer he worked on developing a softer shot in the hope of improving his free-throw accuracy. In the first eight games of this season Leroy made 25 free throws in 40 attempts. Let p be his probability of making each free throw he shoots this season.

a. State the null hypothesis H0 that Leroy's free-throw probability has remained the same as last year and the alternative Ha that his work in the summer resulted in a higher probability of success.

b. Calculate the z statistic for testing H0 versus Ha.

c. Do you accept or reject H0 for a = 0.05? Find the P-value.

d. Give a 90% confidence interval for Leroy's free-throw success probability for the new season. Are you convinced that he is now a better free-throw shooter than last season?

e. What assumptions are needed for the validity of the test and confidence interval calculations that you performed?

4. A software company is planning for an upgrade of their software. You must charge customers $100. Are your customers willing to pay this much? You contact a random sample of 40 customers and find that 11 would pay $100 for the upgrade. If the upgrade is to be profitable, you will need to sell it to more than 20% of your customers. Do the sample data give good evidence that more than 20% are willing to buy?

a. Formulate this problem as a hypothesis test. Give the null and alternative hypotheses.

b. Carry out the significance test. Report the test statistic and the P-value.

c. Should you proceed with plans to produce and market the upgrade?

Reference no: EM131466078

Questions Cloud

Management and concurrency control important : Why is transaction management and concurrency control important?
Determine full and part-time work schedule for the business : Determine a full and part-time work schedule for the business using the fewest number of workers.
Counting and depositing procedures for sunday offerings : To work according to the guidelines contained herein established by the church - Counting and Depositing Procedures for Sunday Offerings
Calculate the current and voltage through the resistor : ln the circuit shown in Figure, calculate the current through the 120 resistor, the voltage across the 19 O resistor, the current supplied by the battery.
Conducting a significance test : What are the conditions for using the standard deviation formula when conducting a significance test? Be specific about p versus p-hat.
Find the reactive power supplied at the rectifier : A bipolar HVDC link operates with ± 300 kV, 600 MW at the rectifier end. Find the reactive power supplied at the rectifier and inverter stations
Discuss the management process : Discuss the management process and how implementing the process
What should be included in a development plan : What should be included in a development plan?
Describe the supply chain for your prospective organization : Describe the supply chain for your prospective organization. Where does your organization bring value in this supply chain?

Reviews

Write a Review

Business Management Questions & Answers

  Action plan virtual teams to develop and enforce task

Propose a specific action plan virtual teams could use to develop and enforce task and communication norms.

  Strategy is the enemy of adaptability

The Chief information Officer at your organization (or any company you are familiar with) recently said; "Strategy is the enemy of adaptability".

  Create an action plan for implementing change

Based on all of your work in the case study so far, create an action plan for implementing change. Your action plan should include the following components of Kotter's Change Process:

  Explain how employee satisfaction could benefit the business

Discuss three reasons why employees should be involved in some decision-making activities, and explain how employee satisfaction could benefit the business.

  Define key elements of richard branson''s leadership style

Determine two key ways in which Richard Branson is likely to motivate employees in order to achieve his goals for the Virginia Group. Indicate whether or not his approach is likely to work in a different organizational setting. Provide support for ..

  Market positioningsometimes it makes sense for a company to

market positioningsometimes it makes sense for a company to go on the offensive to improve its market position and

  What critical internal partnerships and alliances must a

what critical internal partnerships and alliances must a new rampd leader maintain in a manufacturing organization?

  Compute the moving storage in gallons

There are two million autos in a given jurisdiction, each of which travels 300 miles per week at 21 miles per gallon. The average gas station has a six-day inventory on hand, stored in underground tanks. The typical auto has a gas tank that is 38% fi..

  Create a report that reviews the currency and efficacy

What is sexual harassment? Recognising sexual harassment. The law and sexual harassment - what is bullying? Identify bullying behaviours. Discuss bullying and the law.

  If the prime minister of shero implements her campaign

If the Prime Minister of Shero implements her campaign promises, which of the following trends will the citizens of the country be most likely to experience?

  Objectives for the css training program

What are the training objectives for the CSS training program? Indicate how these are tied to the KSA requirements.

  Can you recognize yourself and other people in the dimension

Can you recognize yourself and other people in these dimensions (for example, do you think you can characterize most people you know in terms of the introversion-extroversion dimension)?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

Submit Assignment

Academics

Major Subjects

Majors

Get In Touch

whatsapp: +1-415-670-9521

Phone: +1-415-670-9521

Email: [email protected]

TERMS & POLICIES

HELP & SUPPORT

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd