Reyesburg Corporation is contemplating using a new, more expensive glue in the c

Question

Reyesburg Corporation is contemplating using a new, more expensive glue in the construction of its laminated veneer lumber. Of importance to the company is the carrying load of the lumber. The company has tested 25 beams using the new glue, recording for each beam the pressure (in pounds per square foot) at which the beam broke. The data collected are presented in the following histogram: Based on the histogram, find the proportion of carrying loads in the sample that are at least 920 pounds per square foot. Write your answer as a decimal, and do not round your answer.

Explanation / Answer

The table of frequency with carrying load is given below:

From the table the number of carrying loads between 920 and 940 is 4 and that between 940 and 960 is 3

=> Number of carrying loads that are atleast 920 = 4 + 3 = 7

Proportion of carrying loads that are atleast 920 = 7/25 = 0.28

Carrying load Frequency 860 - 880 3 880 - 900 6 900 - 920 9 920 - 940 4 940 - 960 3

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