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Expert: Sherry Wallin - 4/5/2009


Question
Estimate the proportion of commuters whose travelling times are within 1 standard deviation of the mean. How to do this?I dont know what formula to use. Can you tell me what formula to use?Thanks you very much

Answer
Warm~
    There are a number of ways to determine the standard deviation. You could calculate it by hand using the formula for variance and then taking the square root of your answer because that is the relationship between the variance and standard deviation. Without knowing what information you have it is hard for me to tell you what to do. Please send more info.

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Sherry Wallin

Expertise

I can answer most questions up through Calculus and some in Number Theory and Abstract Algebra.

Experience

I have had my Bachelor's Degree since 1987 and have been a teacher since 1988. I earned my Masters Degree in Mathematics May 2010. I have been teaching at the same community college since 2002.

Education/Credentials
I have taught 12 years at the community college level, medical college, and technical college as well as a high school instructor and alternative education instructor and charter school instructor.

Awards and Honors
Master's GPA 3.56 Bachelor's GPA 3.34 Post grad work not degree related GPA 4.0

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