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Lecture Comments (2)

1 answer

Last reply by:
Tue May 7, 2013 12:05 AM

Post by Becky Means on April 30, 2010

Can you help me solve a problem where I know the demand mean is 750 per week and the Standard deviation for the week is 80 what would the standard deviation be the year (52 weeks)

Mean, Standard Deviation, and the Shape of the Sampling Distribution of the Sampling Mean

  • The mean of the sample mean is μ, the population mean.

  • The standard deviation of the sample mean is σ ⁄ √n.

  • When sampling from a normal distribution, the sample mean is normal. When sampling from a non-normal distribution, if the sample size is at least 30 the distribution of the sample mean is approximately normal.

Mean, Standard Deviation, and the Shape of the Sampling Distribution of the Sampling Mean

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Mean/Standard Deviation of Sample Mean 0:10
    • Estimator
    • Unbiased Estimator
  • Sampling Distribution of Sample Mean 1:50
    • Spread
    • Standard Deviation
    • Consistent Estimator
  • Shape of Sampling Distribution 2:51
    • Normal
  • Shape of Sampling Distribution, cont. 3:50
    • Central Limit Theorem