What percentage of a normal curve falls above +1 standard deviation?

What percentage of a normal curve falls above +1 standard deviation?

A population of snakes have total lengths: 7cm, 5cm, 10cm, 13cm, and 9cm. If two snakes are selected at random without replacement (order does not matter), what is the probability that...

homework help

A box contains 40 marbles, of which 16 are red, 13 are white, and 11 are blue. If one marble is picked at random from this box, what is the probability that it is white or blue?- You...

Given the following information calculate the appropriate test statistics (Zobs or tobs) for testing the equality of the population mean to the given value μ0, and determine whether the test statistic...

A department store wants to sell eight purses that cost the store $40 each and 32 purses that cost the store $10 each. If all purses are wrapped up in forty identical boxes and if each customer picks...

The standard error of the sample mean is calculated to $1,475.73. The president wants to be able to estimate mean cost to within $1,500 of the true population mean with a probability of 80%. How many...

A normal distribution has a mean of 20 and a standard deviation of 10. Two scores are sampled randomly from the distribution and the second score is subtracted from the first. What is the probability...

statistics

A number is selected from a standard normal distribution. What is the probability the number is 0.5000?

Set no. :- 1, 2 , 3 no.of data:- 9 ,12 , 15 mean value :- 8 , 7 , 9 standard deviation:- 1.6 , 1.2 , 1.4 Considering all the data sets together , the overall...

7. A population has a mean of 85 and SD of 9. If many samples of size n = 100 are randomly drawn from the population, approximately what proportion of the sample means fall between 84 and 86? Explain...

What is the probability that you do not draw a red face card? How many different sequences are there if you handed out all of the hearts in a deck of cards? What is the probability of drawing...

A machine has four components, A, B, C, and D, set up in such a manner that all four parts must work for the machine to work properly. Assume the probability of one part working does not depend on...

http://imgur.com/a/EfXOD These are model equations that I need to interpret the parameters for. What are they? Where can I find more information about them?

Suzie Mean number of candy bars sold by team members 20 Standard deviation 3 Candy bars sold by respective sister 35 Becca Mean number of candy bars sold by team...

I have the solution, I just can't get it. The answer says 3/5, wouldn't be it 1/3 as there are either 2 or 3 or 4 white balls. I know they are not mutually exclusive but in the solution they...

A sample of 5 continuous measurements has been recorded and has the following summary statistics: a sample mean of 7, a median of 6 and sample variance of 4.7. What is the estimated standard...

using central limit therom. The mean weight of an adult is 76 kilograms with a variance of 100. If 142 adults are randomly selected, what is the probability that the sample mean would be greater than...

Given that P(A or B) = 2/3, P(A) = 0.67, and P(A and B) = 1/3, find P(B).

Wesley L.

Premier MIT Math Tutor and SHSAT/SAT/ACT Specialist

New York, NY

5.0
(228 ratings)

Chak W.

Experienced Mechanical Engineering, Science, and Math Tutor

Lodi, NJ

4.9
(263 ratings)

Larry L.

Larry - PhD in Biochemistry - experienced in Organic Chem

New York, NY

4.9
(52 ratings)