Tuesday
July 22, 2014

Homework Help: Statistics

Posted by Steven on Monday, December 16, 2013 at 12:53pm.

A manufacturing facility produces iron rods whose mean diameter is 2.5 inches with a standard deviation of 0.2 inch. If a sample of 50 metal rods produced by the facility were randomly selected, what is the probability that the mean of these rods will lie between 2.4 inches and 2.8 inches?

According to census statistics, Hispanics comprise 27.5% of the population of New York City. Suppose a random sample of 400 people is selected from New York City. What is the probability that there are fewer than 22% of Hispanics in the sample? Hint: Use Normal approximation to the Binomial distribution.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

statistics - A company produces steel rods. The lengths of the steel rods are ...
Accounting - For a manufacturing company, is rent, and electricity (of ...
Algebra - Par Manufacturing manufactures steel rods. Suppose the rods ordered by...
statistics - A sample of 100 iron bars is said to be drawn from a large number ...
maths - Will is given 10 rods, whose lengths are all distinct integers. However...
physics - A stairwell is supported by two circular steel rods at one end. The ...
physics - A stairwell is supported by two circular steel rods at one end. The ...
physics - A stairwell is supported by two circular steel rods at one end. The ...
Physics - A hollow spherical iron shell floats almost completely when submerged ...
Physics - An object whose mass is unknown is held by two rigid rods. The whole ...

Search
Members