University A University B Sample Size 50 40 Average Purchase $260 $250 Standard Deviation (σ) $...
|
University A |
University B |
|
| Sample Size |
50 |
40 |
| Average Purchase |
$260 |
$250 |
| Standard Deviation (σ) |
$ 20 |
$ 23 |
We want to determine if, on the average, students at University A spent more on textbooks then the students at University B.
| a. | Compute the test statistic. |
| b. | Compute the p-value. |
| c. | What is your conclusion? Let α = .05. |
Homework Answers
a)
z = (x1-x2)/sqrt(s1^2/n1+s2^2/n2)
= ( 260 - 250)/sqrt(20^2/50 + 23^2/40)
= 2.17
b)
p value = 0.0150
c)
Rject H0 as p value < 0.05
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University A
University B
Sample Size
50
40
Average Purchase
$260
$250
Standard Deviation
(σ)
$...
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