Light bulb lifetime. I've tried 999.5-1,099.5 I've added them and divided by two and tried the range. I don't understand how else to find it.

0.2.23-GI Question Help ight bulb lifetime. Find the mean and median for the data in the following table. Life (Hours) of 50 Randomly Selected Light Bulbs Interval 799.5 - 899.5 899.5 - 999.5 999.5 - 1,099.5 1,099.5 - 1, 199.5 1, 199.5 - 1,299.5 Frequency 2 8 23 12 5 The mean is 1069.5 . The median is (Round to two decimal places if needed.) 4 8 ( Vi More X Vi