Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

How to find the 95% confidence interval for mean.

A small New England college has a total of 400 students.  The Math SAT is mandatory for admission and the mean score of all 400 students is 620.  The population standard deviation is found to be 60.  The formula for a 95% confidence interval yields the interval 640 ± 5.88.  Regulate whether each of the following statements is true or false.

a. The interval is incorrect.  It is much too narrow.

b. If we repeated this procedure many, many times, X-bar would fall between 634.12 and 645.88 about 95% of the time

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M923336

Have any Question? 


Related Questions in Statistics and Probability

A gallup poll claims that at least 60 of adults in the

A Gallup poll claims that at least 60% of adults in the United States have used the Internet for shopping. In a survey of 1,025 randomly selected adults in the U.S., 678 said that they have used the Internet for shopping ...

Exercises -81- for each of the following pairs explain why

Exercises - 8.1- For each of the following pairs, explain why you believe that they are positively related, negatively related, or essentially unrelated. If they are related, identify the dependent variable. a. The cost ...

A researcher conducted an experiment on the effects of a

A researcher conducted an experiment on the effects of a new "drug" depression. The researcher had a control group, and an experimental group that received nothing, a placebo group, and an experimental group that receive ...

Emily marc and thomas meet at a party to which novelists

Emily, Marc, and Thomas meet at a party to which novelists and poets have been invited. Every attendee at the party is either a novelist or a poet (but not both). Every poet knows all the other poets, but every novelist ...

An auditor claims that the average annual salary of a

An auditor claims that the average annual salary of a project manager at a construction company exceeds $82,000. A random sample of 20 project managers had an average salary of $89,600 with a sample standard deviation of ...

The bad debt ratio for a financial institution is defined

The bad debt ratio for a financial institution is defined to be the dollar value of loans defaulted divided by the total dollar value of all loans made. A random sample of six Ontario banks is selected and the bad debt r ...

125 wordshow did the theodore d weld william lloyd garrison

125 words How did the Theodore D. Weld, William Lloyd Garrison, Arthur and Lewis Tappan, and Elizur Wright, Jr assist in the freeing of or ending of slaves/slavery?

1 in stepwise regression why might a predictor variable

1. In stepwise regression, why might a predictor variable that correlates highly with the criterion variable not enter into the regression equation? 2. Explain how you would use regression analysis to see whether variabl ...

Hello kitty company claims that the proportion of its

Hello Kitty Company claims that the proportion of its employees investing in individual investment accounts is higher than national proportion of 50%. A survey of 100 employees in Hello Kitty Company indicated that 58 of ...

In a recent survey of high school seniors a random sample

In a recent survey of high school seniors, a random sample of 1000 females showed that 650 were planning on pursuing a college degree, while a random sample of 1000 females showed that 600 were planning on pursuing a col ...

  • 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