Question

In a quality control survey the length of life, measured to the nearest hour, of 100 light bulbs is noted.
The results are summarised in the table.

Length of life
650-669 670-679 680-689 690-699 700-729

Frequency
6
14
40
34
6
94
(I) Draw a cumulative frequency graph and use it to estimate the median and interquartile range.
(ii) Estimate the mean and standard deviation.​

Answer 1

Answer:

their lens of draw a community frequency graph and use a test and and media and internet Viren establish the main and standard division