Originally Posted by

**bennyya** Hiya!

I need some help with these questions. I'm unsure where to start...

1. Given that z is the standard normal random variable, find P(z > -1.62).

2. Given a sample of ten numbers from 0 to 9 then the coefficient of variation for the same sample of 10 numbers is what?

3. Y is a normally distributed random variable with mean 10 and standard deviation 4. Find the probabilty that Y is greater than 11.

4. P(z >= c) = 0.8980, find c.

5. Carpet manufacturer has a variety of carpet with an average of 1.5 flaws per square metre. These flaws are random and independent. Find the probabilty of fewer than two flaws in a random chosen square metre of carpet.

Thanks!