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Records on a fleet of trucks reveal that the average life of a set of spark plugs is normally distributed with a mean of 22,100 miles. The fleet owner purchased 18 sets and found that the sample average life was 23,400 miles; the sample standard deviation was 1,412 miles. To decide if the sample data support the company records that the spark plugs average 22,100 miles, state your decision in terms of the null hypothesis. Use a 0.05 level of significance.
Report Design View
A feature in database applications that allows users to create and modify report layouts in a design interface.
Field List
A component or pane within database and spreadsheet software that displays all the fields available for a given table or query.
Report Design View
A feature in database software that allows users to visually construct and modify the layout and elements of a report before printing or displaying it.
Property Sheet
A tool within software applications that allows users to view and edit properties of selected objects or elements, such as controls or fields in a database.
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