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Audrey Andrews

Audrey Andrews

The University of Texas at El Paso
Statistics

Statistics teacher | Experienced educator in USA

Greetings! I'm a passionate educator with a Statistics major from The University of Texas at El Paso. My commitment to fostering understanding spans various subjects. Whether unraveling the intricacies of data analysis or simplifying complex concepts, my goal is to empower students with knowledge. Let's embark on a journey of learning together!

Questions

  • What is the variance of {99, 4, 65, 12, -6, 21, 34, -52, 1, 83, -12, 44, 17, -8}?
  • What is the variance of {-5, 9, 7, 4, -15, 7, 18, -2}?
  • How do you find the cumulative relative frequency?
  • Five of the 100 digital video recorders (DVRs) in an inventory are known to be defective. What is the probability you randomly an item that is not defective?
  • How do you construct confidence interval for a correlation coefficient?
  • Mark’s scores on his first nine assignments are: 10,10,9,9,10,8,9,10,and 8. What are the mean, median, mode, and range of his scores?
  • Does an R-Squared value indicate that there is sufficient data for a conclusion?
  • What is the partitioning of a regression?
  • What does a z score tell you?
  • What is the z-score for a 98% confidence interval?
  • What z score corresponds to a one sided p-value of 93%?
  • If monthly retail sales of a good at locations A and B outperform expectations by 1 and 2 standard deviations respectively, which location should expect a greater decline in sales the following month?
  • What causes the null hypothesis to be rejected in an F-test?
  • What does each number on the following box and whisker plot represent?: --------|-----------------|-------|----------------------- 28 34 55 63 98?
  • How does probability relate to the punnett square and the offspring?
  • At the 0.05 significance level, can a physician conclude that there is a difference in the mean amount of weight loss among the three diets?
  • How do I use the empirical rule?
  • For the standard normal distribution, what percentage of values are smaller than z = -1.50?
  • For the standard normal distribution, what is the probability of obtaining a z value greater than zero?
  • Assume that a set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. What is the percentage of scores greater than 120?