The State of Arkansas information technology director is considering a new sole source contract for

the state's microcomputer purchases. One factor is reliability. As a test, the director samples 62

state government computers across the three bidding companies and notes whether the computer

broke before the warranty expired.

Required Repair Before Warranty Expired?

Microcomputer Yes No

SunPro 8 10

ICM 7 21

Dellix 8 8

1. Select and justify the best test(s). The chi-square, Phi, Yates, or Lambda (or even a combination) might be best for a problem given the data and research question. Do not assume the independent is always on the row.
2. Provide the null and alternative hypotheses in formal and plain language for the appropriate test at the 0.05 significance level.
3. Do the math and reject/retain null at a=.05. State your critical value.
4. Explain the results in plain language.