Gabriel Allred

Gabriel Allred

The University of Texas Health Science Center at San Antonio

Statistics teacher | Verified Expert

With a Statistics major from The University of Texas Health Science Center at San Antonio, my passion lies in demystifying numbers and fostering a deep understanding of mathematical concepts. As an experienced tutor, I excel in breaking down complex statistical theories into digestible bits, empowering students to conquer any data-related challenge. My approach focuses on personalized guidance, tailored to individual learning styles, ensuring every student reaches their full potential. Let's embark on a journey of statistical mastery together.


  • Why do the bars touch on a histogram but not on a bar chart?
  • How do you find the mean median and mode of a histogram?
  • When would it be appropriate to perform a non-linear transformation on your data?
  • There are 7 children in a classroom. In how many ways can they line up for recess?
  • Three darts hit a dartboard. If lowest score was #10#, range is #10# and mean of scores is #15#, what was the score for each of the three darts?
  • When should you use a random effects model?
  • What is a one way ANOVA?
  • I have two servers at a grocery store. P(server 1) is 0.4. P(server 2) is 0.6. P(time is less than 5 min | server 1) is 1. P(time is less than 5 min | server 2) is 4/9. What is P(server 1 | time is less than 5 min)?
  • How do you calculate outliers when drawing box plots?
  • A restaurant offers the possibility of 168 three-course dinners. Each dinner has an appetizer, an entrée, and a dessert. If the number of appetizers decreases from 7 to 5, how many fewer possible three-course dinners can the restaurant offers?
  • What is the probability that in three consecutive rolls of two fair dice, a person gets a total of 7, followed by a total of 11, followed by a total of 7?
  • What is the variance of the standard normal distribution?
  • Use the empirical rule to determine the approximate probability that a z value is between -1 and 1 on the standard normal curve.
  • 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 between 80 and 120?
  • Assume that z-scores are normally distributed with a mean of 0 and a standard deviation of 1. If #P(z > b)=0.9706#, what is #b#?
  • If you roll a die #100# times and get #15# ones, what is the probability that the die is not fair? What about if you get #5# ones?
  • Casle, Matthew, Nick, Breayn, and Monika are all running for the president, vice president, and secretary for the Spanish Club. How many possible ways can these students be chosen for the positions?
  • If you roll a die what is the probability getting a number greater than 2?
  • You are scooping ice cream as part of your training at an ice cream shop. The weight of the scoop must be 4 ounces with an absolute deviation of .5 ounce. What is the maximum and the minimum amount of ice cream that are acceptable?
  • Four different sets of objects contain 3, 5, 6, and 8 objects, respectively. How many unique combinations can be formed by picking one object from each set?