Gm533Week3 Checkpoint

In: Business and Management

Submitted By nitza01
Words 586
Pages 3
wk 3 checkpoint
Grading Summary
These are the automatically computed results of your exam. Grades for essay questions, and comments from your instructor, are in the "Details" section below. Date Taken: 11/13/2011
Time Spent: 10 min , 42 secs
Points Received: 35 / 35 (100%) Question Type: # Of Questions: # Correct:
Multiple Choice 8 8

Grade Details 1. Question : The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches.
What is the probability that a sheet selected at random will be less than 29.75 inches long? Student Answer: .8944 .1056 .9332 .0668

Comments:

2. Question : The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.2 inches.
What is the probability that a sheet selected at random from the population is between 29.75 and 30.5 inches long? Student Answer: .4332 .4878 .0546 .9210

Comments:

3. Question : During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10.
Find the probability that a household spent less than $5.00. Student Answer: .9983 0.000 1.00 0.0017

Comments:

4. Question : During the past six months, 73.2% of US households purchased sugar. Assume that these expenditures are approximately normally distributed with a mean of $8.22 and a standard deviation of $1.10. What proportion of the households spent between $5.00 and $9.00? Student Answer: .7611 .7628 .0017 .7594…...

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