Suppose that an investor wants to compare the risks associated with two different stocks. One way to measure the risk of a given stock is to measure the variation in the stock’s daily price changes. The investor obtains a random sample of 25 daily price changes for stock 1 and 25 daily price changes for stock 2.

Hypothesized Mean Difference:

Alternative Hypothesis:   

Standard Error:

Degrees of Freedom:   

t-Test Statistic :

p-Value :

Null Hypoth. at 10% Significance (Reject or Don't Reject) :

Null Hypoth. at 5% Significance (Reject or Don't Reject) :   

Null Hypoth. at 1% Significance (Reject or Don't Reject) :

Data

Day	Price Change
1	-0.65
2	-0.04
3	0.88
4	-0.36
5	-0.67
6	1.86
7	1.80
8	1.03
9	0.16
10	-0.73
11	0.90
12	0.09
13	0.19
14	-0.42
15	0.56
16	1.24
17	-1.16
18	0.37
19	-0.52
20	-0.09
21	1.07
22	-0.88
23	0.44
24	-0.21
25	0.84