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The time required for a student to complete an Economics 110 exam is normally distributed with...

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Basic Math

The time required for a student to complete an Economics 110exam is normally distributed with a mean of 54 minutes and astandard deviation of 16 minutes.

5. ______ What percentage of students will complete the exam inless than 75 minutes (before end of class period)? (A) .4049 (B).9951 (C) .8051 (D) .9049

6. ______ At what point in time (i.e., how long after the examstarts) will one-third of all students have finished taking theexam? (A) 25 minutes (B) 60.9 minutes (C) 47.1 minutes (D) 38.5minutes

7. ______ In a class of 50 students taking an Economics 110exam, what is the probability that the average time required totake the exam will be more than 60 minutes? (A) .4960 (B) .0040 (C).1480 (D) .3520

Answer & Explanation Solved by verified expert
3.9 Ratings (474 Votes)
5 PX 75 PX 75 PZ 75 5416 PZ 131 09049Option D    See Answer
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