math215 Lecture Notes - Lecture 4: Boogie 2Nite, Standard Deviation, Sampling Distribution
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Unit 4 estimation and tests of hypotheses for one population. Unit 4 self test: a population consists of the ages, , of all 20,000 students registered at a canadian university. x. The population distribution is skewed to the right, the population mean, ( ), is 23 years, and the population standard deviation, ( ), is 5 years. ). x: determine the standard deviation of the sampling distribution of sample mean ages ( ). x: suppose a specific random sample yielded a sample mean age of 26 years. Determine the sampling error related to this specific sample. Assume that there are no nonsampling errors: suppose a survey indicated that 85% of all households in a large canadian province have a computer. Canadian elementary students spend watching television per week. What sample size will be required to obtain an estimate of the mean weekly time spent watching television that is within 10 minutes of the population mean.
