# Audrey Allen

University of Massachusetts Global

Statistics

Statistics teacher | Tutor for 6 years

I hold a degree in Statistics from the University of Massachusetts Global. With a passion for numbers and data analysis, I specialize in simplifying complex statistical concepts for students. My goal is to empower learners with the skills and confidence needed to excel in mathematics and beyond. Through personalized instruction and real-world examples, I foster a supportive learning environment where students can thrive. Let's embark on a journey of discovery together, where every question is an opportunity to learn and grow.

## Questions

- How do you find five numbers which have a mean of 14 and a median of 15?
- What information does an ogive provide?
- Which of the following are negatively correlated?
- How do I find the z-score to the following scores, sample n = 25, Mean M = 60, Standard Deviation s = 12?
- How do you calculate the t-score of the slope of a time series regression?
- What is the standard error of an estimator?
- If a t-statistic is negative, should the absolute value be used?
- If the data appear to be exponential, what non-linear transformation might be appropriate for linearizing the data?
- What is the inter-quartile range?
- When you find the upper and lower quartiles what happens if the median is not in the data set?
- How do you make a Box and Whisker plot with the numbers: 60, 90, 90, 92, 100, 100, 100, 100?
- I have a set of data, and the lower fence is 16.25, and the upper 31.05. However, the data values starts at 20.6, and ends at 31.4. I know that 20.6 and 31.05 will be the end of the whiskers, and 31.4 an outlier, but what do I do with the 16.25?
- In a group of 50 patrons, 18 patrons like lattes, 16 patrons like espressos, and 8 patrons like both coffee drinks. How many patrons don't like either of the coffee drinks?
- What is a conditional probability in a two-way table?
- Do all random distributions follow a "normal" distribution?
- For a normal distribution, what is the percentage of data that is between #mu - 0.5 sigma# and #mu + 0.5 sigma#?
- Individuals who have a certain gene have a 0.48 probability of contracting a certain disease. Suppose that 1,863 individuals with the gene participate in a study. What is the standard deviation of the number of people who eventually contract the disease?
- If six pairs of data yield an r = 0.789 and a regression equation of y= 4x-2, what is the best predicted value of y when x = 5?
- The 6 entries in Claudia's checkbook ledger show both deposits and withdrawals. Claudia wrote down $100, -20, -35, $250, -$150, and -85. What is the mean dollar amount for these entries?
- When you roll two number cubes, what are the odds in simplest form against getting two numbers greater than 4?