Lane et al.
Chapter 5
This is a problem that involves binomial probability distribution. The probability of getting
either a head or tail is 0.5.
We are given the following information: N = 9 & p = 0.5.
P( x = k ) =
N!
p x (1 p) N x
x !( N x)!
P( x = 6)

Lane et al.
Chapter 10
The confidence interval is the percentage of the area under the curve to be considered. A
99% confidence interval has 99% of the total areas under the curve, whereas a 95% confidence
interval has 95% of the total area. Therefore, a

Week 7 Homework
2. a) predicted score for a person scoring a 6 on x is 2 * 6 + 9 =21
b) 14 = 2x + 9, x = (14 9) / 2 = 2.5
6. a) r value = .849, p value = .0324, which indicates r is significantly different than zero. We can
reject the null hypothesis in t