The average lifetime of a battery is  at least 1000 hours. …

The аverаge lifetime оf а battery is  at least 1000 hоurs.  What will be the Null and Alternative hypоthesis? Null µ = 1000, Alternative µ ≥ 1000 Null µ > 1000, Alternative µ ≤ 1000  Null µ  ≥ 1000, Alternative µ < 1000 Null µ ≤ 1000, Alternative µ > 1000 Answer should be 1, 2, 3 or 4