Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Find the probability and the inverse of the following problems.

The following three problems (i.e., problems 1-3) refer to the following information:

presume the scores on an exam are normally distributed with mean μ = 75 points, and standard deviation σ = 8 points.

1. The instructor wanted to "pass" anyone who scored above 69. What proportion of exams would have passing scores?

a..25

b..75

c..2266

d..7734

e.-.75

2.  What is the exam score for an exam whose z-score is 1.25?

a.65

b.75

c.85

d..8944

e..1056

3.  Presume that the top 4 percent of the exams will be given an A+. In order to be given an A+, an exam must earn at least what score?

a.61

b.73

c. .516

d.77

e. 89

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M923281

Have any Question? 


Related Questions in Statistics and Probability

Sppose x is a random variable whose n th moment is gn n

Suppose X is a random variable whose n th moment is gn , n = 1 2 3.............. In terms of the gn , find an expression for the m th moment of the random variable Y=aX +b for constants a and b.

It is known that 15 of us home mortgages are under water ie

It is known that 15% of US home mortgages are under water (i.e. the homeowner owes more than the house is worth). Suppose 18 mortgages are randomly selected (assume independence). Let the random variable X equal the numb ...

A manufacturer of soap wishes to know if customers have a

A manufacturer of soap wishes to know if customers have a preference for a bath soap fragrances. To answer their question, a random sample of 200 adult shoppers is offered a free bar of soap .The recipients may choose fr ...

A communication system sends data in the form of packets of

A communication system sends data in the form of packets of fixed length. Noise in the communication channel may cause a packet to be received incorrectly. If this happens, then the packet is retransmitted. Let the proba ...

A random variable x has a uniform distribution over the

A random variable X has a uniform distribution over the interval (-a/2, a/2)  for some positive constant a: (a) Find the coefficient of skewness for X ; (b) Find the coefficient of kurtosis for X ; (c) Compare the result ...

How did egypts physical location along the nile river

How did Egypt's physical location along the Nile River affect the culture's political system,religion, and art? Explore at least three examples.

Independent samples are taken of a random variable x if

Independent samples are taken of a random variable X . If the PDF of is uniform over the interval   and zero elsewhere, then approximate the density of the sample mean with a normal density, assuming the number of sample ...

The average age of a part-time employee at a ski resort has

The average age of a part-time employee at a ski resort has historically been 37 years. A random sample of 50 part-time employees in 2011 had a sample mean age of 38.5 years with a sample standard deviation of 16 years. ...

Why do so many womens lives seem to be divided between

Why do so many women's lives seem to be divided between working for money or goods, and homemaking during the period 1800-1860?

Q1 consider the following simple linear regression models

Q1. Consider the following simple linear regression models for data (x 1 , y 1 ), (x 2 , y 2 ), . . . (x n , y n ): M 1 : y i = β 0 + β 1 x i + ε i , i = 1, 2, . . . , n M 2 : y i = α 0 + α 1 (x i - x¯) + ε i , i = 1, 2, ...

  • 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