To test the company's claim that light bulbs last at least 1000 hours, perform a one-sample hypothesis test:

1. Hypotheses:
   • Null (H₀): μ ≥ 1000 hours
   • Alternative (H₁): μ < 1000 hours
2. Significance Level: Set α = 0.05 (5%).
3. Data Collection: Test a random sample of light bulbs, recording their lifespans.
4. Calculate Test Statistic: Use a z-test or t-test (depending on whether the population standard deviation is known).
5. Decision Rule:
   • If the test statistic is less than the critical value (left-tailed test), reject H₀.
   • If the test statistic is greater, do not reject H₀.
6. Conclusion:
   • Reject H₀: Evidence suggests bulbs last less than 1000 hours.
   • Do not reject H₀: Insufficient evidence to disprove the claim.