statistics distrbutions
UBI BUSINESS To Hand in 15th November 2017 10th November 2017
STATISTICS-DISTRIBUTIONS HW
GRADED 5%
Binomial Distribution
1. A statistician working for major league baseball determined the probability that the hitter will be out on ground balls to be 0.80. In a game where there are 15 ground balls, find the probability that all of these were outs.
Poisson Distribution
2. Flaws in a material tend to occur randomly and independently at a rate of one every 250 square feet. What is the probability that a carpet that is 8 x 10 feet contains no flaws?
Normal Distribution
3. The lifetimes of light bulbs that are advertised to last for 4000 hours are normally distributed with a mean of 4200 hours and a standard deviation of 175 hours. What is the probability that a bulb lasts longer than the advertised figure?
Student t-test
4. Use the t-table (p.288) to find the following values of t.
a.
b.
.05,195
t
.10,15
t
.10,23
t
.025,83
t