Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

To find the probability values increase of raw data, binomial, normal.

A biology teacher had noted that the scores on a standard examination attained by students from her past classes had a mean of 74 and a standard deviation of 14. The teacher decided to use a new book. She supposed this would increase the mean, other than that the standard deviation would remain at 14. Using new book, a class of 50 students scored a mean of 76 on the standardized examination.
  (i) Find the probability that a class of 50 students using the new book will have a (sample) mean as large as or larger than 76 if the new book were equivalent to the old book (i.e., if U= 74 and O = 14 for all students using the new book).
  (ii) Do you think that there is evidence to support the teacher's claim that the new book is superior? {Hint: use part (a).}

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M922997

Have any Question? 


Related Questions in Statistics and Probability

Explain three assumptions for the evaluation of a

Explain three assumptions for the evaluation of a correlation coefficient. Explain three limitations for evaluation a correlation coefficient

A certain three-state markov chain has a transition

A certain three-state Markov chain has a transition probability matrix given by Determine if the Markov chain has a unique steady-state distribution or not. If it does, find that distribution.

A highly trafficked interstate highway has an hourly

A highly trafficked Interstate Highway has an hourly average of 2 accidents over any 10 mile stretch. The number of accidents is believed to follow a Poisson distribution. Use the Poisson Distribution table (pages 3 & ...

What statistical programs could help us with automated

What statistical programs could help us with automated procedure that identifies the best-fitting regression models with predictors we specify?

A pair of random variables xy is equally likely to fall

A pair of random variables, ( X , Y ) , is equally likely to fall anywhere within the region defined by  |X| + |Y| (a) Write the form of the joint PDF, f x,y (x,y). (b) Find the marginal PDFs f x (x) and f y (y). (c) Fin ...

Question nbspproblem consists of two different scenarios

Question : Problem consists of two different scenarios requiring you to find the market demand curve. a.  Joe, Mary, and Ellen all have the same individual demand curve for peanuts. This demand curve is P = 10 - Q. They ...

I deal myself 3 cards from a standard 52-card deck find the

I deal myself 3 cards from a standard 52-card deck. Find the probabilities of each of the following events: (a) 2 of a kind (e.g., 2 fives or 2 kings); (b) 3 of a kind; (c) 3 of the same suit (a.k.a a flush, e.g., 3 hear ...

You are planning to purchase a toy robot for your nephews

You are planning to purchase a toy robot for your nephew's birthday. The robot has 5 electronic components. There is a 1% probability that any one of the components will be defective. If two or more of the components are ...

Question 1describe a recent gallup poll be sure to include

Question 1 Describe a recent Gallup poll. Be sure to include the results of the poll, how the poll was conducted, and what the results will be used for. Question 2 Describe a recent study where data was gathered. If poss ...

Use the value of the line correlation coefficient to

Use the value of the line correlation coefficient to calculate the coefficient of determination. What does this tell you about the explained variation of the data about the regression line? About the unexplained variatio ...

  • 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