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An English professor assigns letter grades on a test according to the following scheme. A: Top 9% of scores B:...

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Question

Statistics

An English professorassigns letter grades on a test according to the followingscheme.

A: Top 9% ofscores

B: Scores below thetop 9% and above the bottom 63%

C: Scores below thetop 37% and above the bottom 22%

D: Scores below thetop 78% and above the bottom 6%

F: Bottom 6% ofscores

Scores on the test arenormally distributed with a mean of 66.9 and a standard deviationof 9.2. Find the numerical limits for a D grade. Round your answersto the nearest whole number, if necessary.

Answer

2 Points

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Tables

If you would like tolook up the value in a table, select the table you want to view,then either click the cell at the intersection of the row andcolumn or use the arrow keys to find the appropriate cell in thetable and select it using the Space key. Note: Selecting a cellwill return the value associated with the column and row headersfor that cell.

numerical limit 1 and numerical limit 2

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