Scores on a test are normally distributed with a mean of, Ask an Expert

Statistics

Finding the percentile 81, this separates the bottom 81% from the top 19%

Scores on a test are normally distributed with a mean of 60.9 and a standard deviation of 12. Find out P81, which separates the bottom 81% from the top 19%.

a. 0.88
b. 0.291
c. 64.4
d. 71.5

View complete question

Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M920742

Have any Question?Write your Review or question?

Related Questions in Statistics and Probability

A production system has two spares of a critical component

A production system has two spares of a critical component that have average uptime 1/lamba = 1 month. Find the probability that the 3 components (the operating one and the two spares) will last more than 6 months. Assum ...

A study discovered that americans consumed an average of

A study discovered that Americans consumed an average of 10.7 pounds of chocolate per year. Assume that the annual chocolate consumption follows the normal distribution with a standard deviation of 3.1 pounds. Complete p ...

A highway rest area contains a vending machine that

A highway rest area contains a vending machine that dispenses cups of coffee. The amount of coffee that the machine provides when a purchase is made approximately follows a uniform distribution between 200 and 250 ml. (a ...

Out ofnbsp350nbspapplicants for a jobnbsp158nbspare female

Out of 350 applicants for a job, 158 are female and 66 are female and have a graduate degree. Step 1 of 2: What is the probability that a randomly chosen applicant has a graduate degree, given that they are female? Expr ...

What would be examples of valid selection methods used by

What would be examples of valid selection methods used by the human resource department to ensure selecting the appropriate candidate for a job.

A study indicates that the weights of adults are normally

A study indicates that the weights of adults are normally distributed with a mean of 140 lbs and a standard deviation of 25 lbs. Find a value of weight x such that only 20% of adults weigh less than that. A. 136 B.190 ...

Consider the following random sample ofnbspdata8 6 -6 0 -9

Consider the following random sample of data: 8, 6, -6, 0, -9, 4, -1, 7, 6, 84 a) What is the standard deviation of the sample data? Round your response to at least 3 decimal places. b) If the outlier is removed, what is ...

1 define organizational communication2 what interesting

1. Define organizational communication 2. What interesting about the subject of organizational communication

In a study of helicopter usage and patient survival among

In a study of helicopter usage and patient? survival, among the 55,032 patients transported by? helicopter, 227 of them left the treatment center against medical? advice, and the other 54,805 did not leave against medica ...

A laboratory worker finds that the 3 of his blood samples

A laboratory worker finds that the 3% of his blood samples test positive for the HIV virus. In a random sample of 70 blood tests, what is the mean number that test positive for the HIV virus? (Round your answer to 1 deci ...

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

Recent Questions

Ask Statistics and Probability Expert