Data for population: weights of American women and men mu Sigma Women, age 20+ 1

Question

Data for population: weights of American women and men mu Sigma Women, age 20+ 164.7 lb 32 lb Men, age 20+ 194.7 lb 30 lb Problem 1. Assume that the HWAS data is arandom sample of all online statistics students. Is this agood assumption? What are the risks in using this assumption? Give evidence for your opinion. Problem 2. Describe a study that a researchercould use to gain a valid picture of the age of of onlinestatistics students. Data for population: weights of American women and men mu Sigma Women, age 20+ 164.7 lb 32 lb Men, age 20+ 194.7 lb 30 lb Problem 1. Assume that the HWAS data is arandom sample of all online statistics students. Is this agood assumption? What are the risks in using this assumption? Give evidence for your opinion. Problem 2. Describe a study that a researchercould use to gain a valid picture of the age of of onlinestatistics students. Data for population: weights of American women and men mu Sigma Women, age 20+ 164.7 lb 32 lb Men, age 20+ 194.7 lb 30 lb

Explanation / Answer

1. "random sample of all online statistics students" This begs the question of how the survey was conducted. Manyonline surveys suffer from some type of response bias - those beingsurveyed either fail to answer or answer incorrectly. 2. Assuming online statistics students would have to includetheir date of birth in registration for classes, one could use thatdata to find the mean age. When registering for onlineclasses, non-response would not be allowed, and studentswould probably give correct data.

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