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Chapter 11: Q.36 (page 656)
The degree of freedom is.
Given data:
The number of columns is and the number of rows is
To calculate the degree of freedom is
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A teacher predict that the distribution of grades on the final exam will be and they are recorded in table 11.27
The actual distribution for a class of 20 is in table 11.28
At thesignificance level, what can you conclude?
Read the statement and decide whether it is true or false.
The test to use when determining if the college or university a student chooses to attend is related to his or her socioeconomic status is a test for independence.
Perform a goodness-of-fit test to determine whether the local results follow the distribution of the U.S. overall student population based on ethnicity.
A plant manager is concerned her equipment may need recalibrating. It seems that the actual weight of the . cereal boxes it fills have been fluctuating. The standard deviation should be at most . In order to determine if the machine needs to be recalibrated, randomly selected boxes of cereal from the next day鈥檚 production were weighed. The standard deviation of the boxes was . Does the machine need to be recalibrated?
The manager of "Frenchies" is concerned that patrons are not consistently receiving the same amount of French fries with each order. The chef claims that the standard deviation for a ten-ounce order of fries is at most oz., but the manager thinks that it may be higher. He randomly weighs orders of fries, which yields a mean of oz. and a standard deviation of two oz.
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