Find probability of completing exam in one hour

Reference no: EM13150719

The time needed to complete a final examination in a particular college course is normally distributed with a mean of 77 minutes and a standard deviation of 12 minutes. Answer the following questions.

a.What is the probability of completing the exam in one hour or less (to 4 decimals)?

b.What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes (to 4 decimals)?

c.Assume that the class has 60 students and that the examination period is 90 minutes in length. How many students do you expect will be unable to complete the exam in the allotted time (0 decimals)?

Reference no: EM13150719

Questions Cloud

How many moles of o2 will be produced : 4 KO2 + 2 H2O + 4 CO2 ==> 4 KHCO3 + 3 O2 How many moles of O2 will be produced if 5.86 moles of CO2 react completely?

What is the pressure of the gas : A manometer shows a mercury level of 225 mm Hg on the closed end of the tube and 108 mm Hg on the open end. If the atmospheric pressure is 760 torr,

How much no2 would effuse : if 0.00484 mol N2O effuses through an orifice in a certain period of time, how much NO2 would effuse in the same time under the same conditions ?

Pop culture reference : Find a pop culture reference (from TV, movie, music, magazine...) of an economic concept. The reference can be anything we have covered in class.

Find probability of completing exam in one hour : What is the probability of completing the exam in one hour or less (to 4 decimals)? What is the probability that a student will complete the exam in more than 60 minutes but less than 75 minutes.

Rraditional cost accounting system : Weber Corporation has used a traditional cost accounting system to apply quality control costs uniformly to all products at a rate of 15% of direct labor cost. Monthly direct labor costs for its main product is $30,000.

Equivalent units for materials and conversion : The ending WIP inventory on May 31 consisted of 10,000 units. These latter units were 100% complete with respect to materials and 80% complete with respect to conversion. Costs added during the month were $330,000 for materials and $503,750 for co..

Confidence interval for percentage of boards in shipment : 12 fall outside these specifications. construct the 95% confidence interval for the percentage of all boards in this shipment that fall outside the specifications.

Build a new restroom in the left field : The NHFishercats are debating whether to build a new restroom in the leftfield area near the patio adjoining the bar/restaurant located there

User Account

All Pages