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A researcher wishes to test whether a particular diet has an effect on blood pressure. The blood pressure of 25 randomly selected adults is measured. After one month on the diet, each person's blood pressure is again measured. For 16 people, the second blood pressure reading was lower than the first, and for 9 people, the second blood pressure reading was higher than the first. At the 0.01 significance level, test the claim that the diet has an effect on blood pressure.
Select Query
A database query that retrieves specific data from one or more tables according to defined criteria.
Update Query
A type of query in a database management system that is used to modify the values of fields in existing records.
Update
The process of modifying existing data or software to bring it to a newer state or version.
Manager's Name
A data field intended to store the name of a person who holds a managerial position within an organization.
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