Question
The building specifications in a certain city require that the sewer pipe used in residential areas have a mean breaking strength of more than 2,500
The building specifications in a certain city require that the sewer pipe used in residential areas have a mean breaking strength of more than 2,500 pounds per lineal foot. A manufacture who would like to supply the city with sewer pipe has submitted a bid and provided the following additional information. An independent contractor selected a number of sections of the manufacturer's pipe and tested each for breaking strength. The results (pounds per lineal foot) are shown below with the mean and standard deviation of 2571.4and115.1respectively:
2610, 2750, 2420, 2510, 2540, 2490, and 2680.
At 10%level of significance,the conclusion with respecttothe pipe meeting required specificationsis:
a. | there is sufficient evidence to conclude that the manufacturer's sewer pipe meets the required specifications. | |
b. | there is sufficient evidence to conclude that the manufacturer's sewer pipe meets the required specifications when in fact such evidence may not exist. | |
c. | there is not sufficient evidence to conclude that the manufacturer's sewer pipe meets the required specifications when in fact such evidence may exist. | |
d. | there is not sufficient evidence to conclude that the manufacturer's sewer pipe meets the required specifications. | |
e. | the significance level used in this analysis is too small. |
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