Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Test the given problem using independent sample t -test.

A school district wants to determine if the girls are equal to boys in test scores. They took a random sample of 22 8th grade girls and 24 8th grade boys. The district looked at recent CAT scores and found the mean score for girls to be xbar1 = 25 and the mean score for boys to be xbar2 = 26. The standard deviation for the girls is s1 = 2.2 and for the boys the standard deviation is s2 = 3.4. Is the school district correct in assumed the girls are equal in performance to boys? They are 95 percent sure their assumption is correct.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M921700

Have any Question? 


Related Questions in Statistics and Probability

Assignment query optimisation this assignment aims to

Assignment: Query Optimisation This assignment aims to develop your skills optimizing query. It involves identifying the suitable methods for structuring the data and writing the query. First, you will need to create a q ...

According to figures released by the new york city

According to figures released by the New York City government, smoking among New York City teenagers is on a decline, continuing a trend that began more than a decade ago (The New York Times, January 2, 2008). According ...

A certain lti system has an inputoutput relationship given

A certain LTI system has an input/output relationship given by (a) Find the output autocorrelation  , in terms of the input autocorrelation,  (b) Find the output PSD  in terms of the input  (c) Does your answer to part ( ...

A survey was taken at a k-6thnbspgrade schoolnbsp do you

A survey was taken at a K-6 th  grade school.  Do you have enough time at lunch? Given the table below, answer the following questions: Yes No Girls 35 124 Boys 100 62 If b represents the event of selecting a response fr ...

Two students play the following game two dice are tossed if

Two students play the following game. Two dice are tossed. If the sum of the numbers showing is less than 7, student A collects a dollar from student B. If the total is greater than 7, then student B collects a dollar fr ...

Let x be an erlang random variable with pdfnbspnbspderive a

Let X be an Erlang random variable with PDF,     Derive a saddle point approximation for the left tail probability,    Compare your result with the exact value for

Letnbspnbspnbspbe a random process where

Let     be a random process, where A n  and    is the Kronecker delta function. This process is sometimes used as a model for random noise. (a) Find the time-varying autocorrelation function  (c) Find the PSD of this pro ...

Let xn be the sum of independent rolls of a fair cubicle

Let X[n] be the sum of independent rolls of a fair (cubicle) die. (a) Is X[n]a Markov chain? (b) Define a new process according to  That is for a non-negative integer q. Find the transition probability matrix for the pro ...

In order to save costs a firm issued a guideline that fax

In order to save costs, a firm issued a guideline that fax transmissions of 10 pages or more should be sent by 2-day mail instead. Exceptions are allowed but they want the average to be 10 or below. The firm examined 35 ...

The three letters c a and t represent the states of a

The three letters C, A, and T represent the states of a word-generating system. Let the initial state probability vector be (1/3 1/3 1/3) for the three letters, respectively. The transition matrix is given as What is the ...

  • 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

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate