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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 z-score of X, if n = 204, #mu= 15#, SD =1, and X =35?
  • What is the mean, median, and mode of 14, 15, 22, 15, 2, 16, 17, 13?
  • What are the mean and standard deviation of a binomial probability distribution with #n=16 # and #p=21/32 #?
  • What is the median of the following numbers?: 16, 9, 10, 5, 4?
  • A pet store has 4 poodles, 3 terriers, and 2 retrievers. If Rebecca and Aaron (in that order) each select a puppy at random, without replacement, what is the probability that Aaron selects a retriever given that Rebecca selects a poodle?
  • How many ways can a baseball manager make a 9-player batting order from a group of 16 players?
  • The mean height of 8 male subjects in a room is 177.62 cm. One subject leaves the room. The mean height is now 176.42 cm. What is the height of the male who left the room?
  • How to find the probability that the sample mean computed from a 25 measurements will exceed the sample mean computed from the 36 measurement by at least 3.4 but less than 5.9.?

  • What is the difference between using the pooled variance and the unpooled variance in a two-sample t test for means?
  • Assume that z scores are normally distributed with a mean of 0 and a standard deviation of 1. If #P(z<b)=.9817#, what is #b#?
  • What is the expected value of the sum of two rolls of a six sided die?
  • Suppose that a committee of 4 is to be chosen from 6 married couples. In how many ways can this be done? Of the possible committees how many contain exactly 2 women?
  • What is 'z' if the confidence interval is 80%?
  • A collection of 22 laptops includes 6 defective laptops. If a sample of 3 laptops is randomly chosen from the collection, what is the probability that at least one laptop in the sample will be defective?
  • The astrological configuration of a party with n guests is a list of twelve numbers that records the number of guests with each zodiac sign. How many different astrological configurations are possible for n = 100?
  • What conditions must be met for conducting a two-sample t test for the means?
  • For the z-test statistic 1.34, how do you compute the p-value assuming that the hypothesis test is a one-tailed test?
  • How are two-sample t-tests different from two sample z-tests?
  • Given a binomial distribution with n = 8 and p = 0.40, what is the mean?
  • A child rolls a 6-sided die 6 times. What is the probability of the child rolling exactly three sixes?