encouraging critical thinking and diverse perspectives within groups

In Stock

Size Guide

$34.99 $29.99

Shipping and Returns Policy

Jan 16, 2019 ... However, the sample median is biased: with small sample sizes, it tends to overestimate the population median. This is not the case for the mean ... Aug 17, 2023 ... 1) Positive skewness means the data is skewed to the right, with the tail of the distribution stretching further to the right, not the peak. Mar 16, 2023 ... The distribution is said to be right-skewed, right-tailed, or skewed to the right, despite the fact that the curve itself appears to be skewed ... Apr 19, 2018 ... When a distribution has a few extreme scores toward the low end relative to the high end (e.g., when a test is easy and most test takers do well) ... Dec 1, 2017 ... Many textbooks teach a rule of thumb stating that the mean is right of the median under right skew, and left of the median under left skew. Sep 19, 2016 ... The answer is to use median income data -- either instead of or in addition to – average income data, because outlier data can skew the average. The histogram displays a symmetrical distribution of data. A distribution is symmetrical if a vertical line can be drawn at some point in the histogram such ... A positive skew occurs when the dataset contains values much greater than the mean but far fewer values less than the mean. A negative skew occurs when the ... Aug 20, 2023 ... Prior studies have predominantly used the mean and SD for outlier detection. Yet, I believe that the modified z-score method is more robust than ... May 21, 2024 ... As you have noticed, people use "tail" informally. Typically, theyy mean to suggest that standard distributions do a poor job at estimating the ...
  • Next Day Delivery by USPS Find out more

    Order by 9pm (excludes Public holidays)

    $11.99

  • Express Delivery - 48 Hours Find out more

    Order by 9pm (excludes Public holidays)

    $9.99

  • Standard Delivery $6.99 Find out more

    Delivered within 3 - 7 days (excludes Public holidays).

  • Store Delivery $6.99 Find out more

    Delivered to your chosen store within 3-7 days

    Spend over $400 (excluding delivery charge) to get a $20 voucher to spend in-store
  • International Delivery Find out more

    International Delivery is available for this product. The cost and delivery time depend on the country.

You can now return your online order in a few easy steps. Select your preferred tracked returns service. We have print at home, paperless and collection options available.

You have 28 days to return your order from the date it’s delivered. Exclusions apply.

View our full Returns and Exchanges information.

Our extended Christmas returns policy runs from 28th October until 5th January 2025, all items purchased online during this time can be returned for a full refund.

No reviews yet. Only logged in customers who have purchased this product may leave a review.