Find out the variance and standard deviation, Mathematics

The probability of a rare disease striking a described population is 0.003. A sample of 10000 was examined. Determine the expected no. suffering from the disease and thus find out the variance and the standard deviation for the above problem

Solution

Sample size n = 10000

P(a person suffering from the disease) = 0.003 = p

∴ expected number of people suffering from the disease

Mean = λ = 10000 × 0.003

            = 30

            = np = ?

Variance = np = 30

Standard deviation = √(np) = √?

                        =  √(30)

                        = 5.477

Posted Date: 2/20/2013 6:31:15 AM | Location : United States







Related Discussions:- Find out the variance and standard deviation, Assignment Help, Ask Question on Find out the variance and standard deviation, Get Answer, Expert's Help, Find out the variance and standard deviation Discussions

Write discussion on Find out the variance and standard deviation
Your posts are moderated
Related Questions
Extrema : Note as well that while we say an "open interval around x = c " we mean that we can discover some interval ( a, b ) , not involving the endpoints, such that a Also,

I need help with my calculus



Describe Square Roots? When a number is written inside a radical sign (√), the number is called the radicand, and we say that you are "taking the square root of" that number.

How may six digit numbers can be made in which the sum of the digits is even? Ans = 9*10*10*10*10*5

Evaluate following limits. Solution In this case we also contain a 0/0 indeterminate form and if we were actually good at factoring we could factor the numerator & den

examination questions and answers to the above title.

Q. Define Degrees and Radians? Ans. Just as your height can be measured in meters or feet and your weight can be measured in pounds or kilograms, angles can be measured in

The height of a rectangle is 20 cm. The diagonal is 8 cm more than the length. Determine the length of the rectangle. a. 20 b. 23 c. 22 d. 21 d. To determine the len