Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Statistics and Probability Expert

Probability using normal distribution.

An accounting firm is planning for the next tax preparation season. From last year's returns, the firm collects a systematic random sample of 100 filings. The 100 filings showed the average preparation time of 90 minutes with a standard deviation of 140 minutes.

1. The intelligence Quotient test scores normally distributed with a mean of 100 and a standard deviation of 15. What is the possibility that a person would score 130 or more on the test?

2. What is the probability that a person would score between 85 and 115?

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M919867

Have any Question? 


Related Questions in Statistics and Probability

What type of average would be most appropriate for

What type of average would be most appropriate for determining (a) the average income of employees of Sacred Heart Hospital; (b) a course grade where projects count 15%, quizzes 30%, and exams 55%; (c) the average % incr ...

A three-dimensional vector random variable x has a

A three-dimensional vector random variable, X, has a covariance matrix of Find a transformation matrix A such that the new random variable   Will be uncorrelated.

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 ...

Suppose we are interested in finding the left tail

Suppose we are interested in finding the left tail probability for a random variable, X . That is, we want to find     Rederive an expression for the Chernoff bound for the left tail probability.

Q1 explain carefully the difference between an unbiased

Q1. Explain carefully the difference between an unbiased estimator and a consistent estimator. Does one imply the other? If so, show mathematically, and if not provide examples. Q2. In this question, we will use a data s ...

A white noise process xt with a psd ofnbspnbspis passed

A white noise process, X(t) with a PSD of   is passed through a finite time integrator whose output is given by Find the following: (a) the PSD of the output process, (b) the total power in the output process, (c) the no ...

Letnbspnbspbe a wide sense stationary gaussian random

Let   be a wide sense stationary Gaussian random process and form a new process according to  is a constant and is a random variable uniformly distributed over   and independent of  (a) Is Y(t) wide sense stationary? (b) ...

Question 1 -thirty teeth were randomly allocated into three

Question 1 - Thirty teeth were randomly allocated into three groups of 10 and a cavity in each tooth filled using one of three preparations. Following immersion in a dye, the percentage of linear leakage occurring at the ...

What factors affect the generalizability of findings from a

What factors affect the generalizability of findings from a particular test? Describe the relationship between the cut score and the selection ratio in two pages.

1 compute the area under the standard normal curve in the

1) Compute the area under the standard normal curve in the interval [-.75, .75]. What is the 75th percentile of the standard normal curve? 2) There is a data set that closely follows a normal distribution with standard d ...

  • 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