The table shows some information about the lifetimes, t , in hours, of some lightbulbs. Lifetime Frequency 25 < t ≤ 50 70 50 < t ≤ 100 76 100 < t ≤ 150 29 150 < t ≤ 200 91 200 < t ≤ 250 0 250 < t ≤ 300 15 300 < t ≤ 350 23 Estimate the mean lifetime of a bulb. Give your answer rounded to 2 DP. - QAmmunity.org

The table shows some information about the lifetimes, t , in hours, of some lightbulbs. Lifetime Frequency 25 < t ≤ 50 70 50 < t ≤ 100 76 100 < t ≤ 150 29 150 < t ≤ 200 91 200 < t ≤ 250 0 250 < t ≤ 300 15 300 < t ≤ 350 23 Estimate the mean lifetime of a bulb. Give your answer rounded to 2 DP.

asked Feb 19, 2023 18.4k views

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