# Oliver Aldrich

Statistics teacher | Experienced educator in USA

I'm a Statistics graduate from Washington & Jefferson College, passionate about unraveling the intricacies of data and its real-world applications. With a solid foundation in statistical theory and methods, I thrive on helping students grasp complex concepts with clarity. Whether it's probability theory, regression analysis, or data visualization, I'm dedicated to fostering a deep understanding and appreciation for the power of statistics. Let's embark on a journey to demystify numbers together and unlock their potential in various fields.

## Questions

What is the effect on the mean, median, mode, IQR, and range of each data value is increased by 3?

400 meters are normally distributed with a mean of 84 seconds and a standard deviation of 6 seconds. What percentage of the times are more than 72?

Sue's average for 9 games of bowling is 108. What is the lowest score she can receive for the tenth game to have a mean of 110?

How do you find the median on a cumulative frequency graph?

He probability of rain on any given day is 2/3. What is the probability of at most one day of rain during the next 3 days?

A couple wants to have 3 kids. What is the probability all three kids are girls?

Two balls are drawn from a bag containing 5 white and 7 black balls at random. What is the probability that they would be of different colours?

What is the z-score of sample X, if #n = 36, mu= 12.3, St. Dev. =21, and mu_X =18.5#?

What is the probability of not tossing three heads with three fair coins?

What does population distribution mean?

What is APY(Annual Percentage Yield)? How is the APY compounded semiannually at #15%#, different from the same amount compounded continuously at #14%#?

Two dice are thrown. Event #A# is "the sum of two dice is #7#" and Event #B# is "at least one die is #6#". Are #A# and #B# independent?

What is the mean, median, and mode of 86, 90, 93, 85, 79, 92?

A coin is tossed 16 times. What is the probability of obtaining exactly 14 heads?

Is "The time it takes to complete an exercise session" continuous or discrete data? Why?

What are the mode, median, and mean of {15, 27, 29, 13, 18, 19, 15, 19, 19, 27, 15, 22, 13, 26, 20}?

You have studied the number of people waiting in line at your bank on Friday afternoon at 3 pm for many years, and have created a probability distribution for 0, 1, 2, 3, or 4 people in line. The probabilities are 0.1, 0.3, 0.4, 0.1, and 0.1, respectively. What is the probability that at most 3 people are in line at 3 pm on Friday afternoon?

How do I find the range of lengths in this question?

How do you find probabiities using a density curve?

Suppose a survey of 511 women in the United States found that more than 63% are the primary investor in their household. Which part of the survey represents the descriptive branch of statistics?