NumXL New Order System

NumXL New Order System

We are excited to announce a new change to our online order system: we have switched our payment processor to Fast Spring (Santa Barbara, CA USA). Using Fast Spring’s simple yet secure shopping cart system, we are able to offer…

 Making Sense of Diesel Prices

Making Sense of Diesel Prices

In this case, we examine the highway retail price ($/Gallon) for “No.2 Ultra Low Sulfur (0-15 ppm) Diesel” in the EIA nine (9) PADD regions and carry on principal component analysis in an attempt to find a minimal subset of…

 Calculating CAPM Beta

Calculating CAPM Beta

In this paper, we will apply simple linear regression to calculate the CAPM beta for two technology stocks: Microsoft (MSFT) and IBM, then validate the model’s assumptions, identify influential data-points (e.g. outlier), ensure structural stability over the data sample, and…

 NumXL Price Change Coming

NumXL Price Change Coming

With great reluctance, Spider will be increasing the price of a NumXL license with the release of NumXL 1.60 (Apache). The NumXL annual license price will increase to $200/yr (a $50 increase) for new customers only. That means all our current customers…

 NumXL customers’ reviews

NumXL customers’ reviews

We’d love to hear your ideas and experience with NumXL and our support. To keep the reviews objective and let us truly assess where we stand in terms of service quality, we are asking you to leave anything special aside…

 NumXL 1.59 TUCSON is released

NumXL 1.59 TUCSON is released

We are thrilled to announce the official release of a new version of NumXL – 1.59 Tucson Along with numerous fixes, NumXL 1.59 supports 64-bit version of Microsoft Excel 2010 and 2013, which will make it possible to analyze larger…

 NumXL 1.58 BAJA is out

NumXL 1.58 BAJA is out

We are pleased to announce the release of a new version of NumXL: 1.58 BAJA. NumXL 1.58 BAJA now finally has Wizards for constructing Histogram and QQ plot, and performing common statistical tests: Normality test, White Noise Test, ARCHi Effect…