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Unformatted text preview: R EVIEW E XERCISE D OES NOT NEED TO BE TURNED IN F ALL 2007 I NSTRUCTOR : E SFANDIARI As it is mentioned in the syllabus, you should be familiar with the following concepts prior to starting this class. The following review exercise has been designed to help you review these concepts. You are persuaded to work in groups of 2 or 3. You are not required to turn it in for grading. You will be provided with the answers. Basic concepts of descriptive statistics including the mean, median, variance, and standard deviation Sampling distribution, the Central Limit Theorem, the normal distribution, and the students t-distribution, Basic concepts of inference, and Inference for single samples 1 . In the general population, Stanford Binet's IQ scores are nearly normally distributed with a mean of 100 and standard deviation of 16. a. What is the probability that a randomly selected person will have IQ below 80? b. What is the probability that a randomly selected person will have IQ above 120? c. What is the probability that a randomly selected person will score between 70 and 130? 2. Compute the mean, median, variance, and standard deviation for the following set of scores: 2, 5, 12, 13, 16, 17, 19, 20, 22 3. A researcher wants to estimate the average number of the seventh graders in the Los Angels Unified School District (LAUSD) who suffer from math anxiety. He chose a random sample of 100 seventh graders from LAUSD and administered a test of math...
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This note was uploaded on 05/02/2011 for the course STAT 101A taught by Professor Mahtashesfandiari during the Winter '11 term at UCLA.
- Winter '11