Chapter 11: Q.31 (page 660)
What is the p-value?
The p-value is zero.
Given data:
The formula can be used to determine the p-value in an excel sheet, as shown below.
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Read the statement and decide whether it is true or false:
In a goodness-of-fit test, the expected values are the values we would expect if the null hypothesis were true.
A poll in California surveyed people about taxing sugar-sweetened beverages. The results are presented in the Table and are classified by ethnic group and response type. Are the poll responses independent of the participants’ ethnic group? Conduct a test of independence at the significance level.
A market researcher wants to see if two different stores have the same distribution of sales throughout the year. What type of test should he use?
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’s production were weighed. The standard deviation of the boxes was . Does the machine need to be recalibrated?
A psychologist is interested in testing whether there is a difference in the distribution of personality types for business majors and social science majors. The results of the study are shown in Table. Conduct a test of homogeneity. Test at a level of significance.
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