Question 1 Report
Measurements of the diameters, in centimeters, in centimeters, of 20 copper spheres are distributed as shown below:
| Class boundary in cm | frequency |
| 3.35 − 3.45 | 3 |
| 3.45 − 3.55 | 6 |
| 3.55 − 3.65 | 7 |
| 3.65 − 3.75 | 4 |
What is the mean diameter of the copper spheres?
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