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A tyre manufacturer claims that more than 90% of his tyres will last at least 80,000...

A tyre manufacturer claims that more than 90% of his tyres will last at least 80,000 km. In a random sample of 200 tyres, 190 wore out after reaching 80,000 km. Does this evidence support the manufacturer's claim at the 5% level of significance? Use the following six steps to arrive at your conclusion.
Step 1. Statement of the hypotheses H0: HA:
Step 2. Test statistic and the standardised test statistic
Step 3. Level of significance
Step 4. Decision rule
Step 5. Computation
Step 6. Conclusion

Math   Statistics-And-Probability   
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