Blog

Use the Frequency sheet. Use a bin width of 10 to create a frequency distribution (0-10, 11-20, etc.). How many data points are between 81-90? [a] Based on the frequency distribution you obtained, the data is [b] skewed.

If the total sum of squares (SST) is 2,976.4 and the sum of squares due to error (SSE) is 1085.9, what is the r-squared value? Please round your answer to four decimal places.

Use the Logit sheet. An online retailer aims to predict whether a customer will make a repeat purchase using a logistic regression model based on customer data. As predictors, the model considers customer age (in years), annual spending (in hundreds of dollars), loyalty program membership (1 if a member, 0 otherwise), and customer tenure (measured by the number of years the customer has shopped with the retailer). The Logit sheet contains the descriptive statistics and logit regression results. What is the marginal effect of “age” at the mean? Report as a percent without the % sign, four decimal places.

Use the ConcertSales sheet. Which factor is more strongly associated with the number of tickets sold?

The following table lists selectors in the left column and lines of the following code. Match the selectors to the lines containing the HTML tag that they would match. 1 2 3 4 5 6 7 8 9 10 11 12 … … … … … …

Given the following HTML code and CSS Selector, type an x in the box next to each line that the CSS selector would select and a – in all other boxes. If a selected tag is opened on one line and closed several lines later, put xs in on all lines until the tag is closed. line HTML CSS [a1] [a2] [a3] [a4] [a5] [a6] [a7] [a8] [a9] [a10] [a11] [a12] 1 2 3 4 5 6 7 8 9 10 11 12 … … … … … … main p

Given the following HTML, write a CSS selector to select the yellow highlighted elements. 1 2 3 4 5 hello Your selector should select all yellow highlighted elements and no additional elements on the page. Write just the selector so that your answer could be copy-pasted into the following code block replacing the green highlighted comment and the code would be valid: /* your selector */ { /* styles here … */}

Given the following HTML, write a CSS selector to select the yellow highlighted elements. 1 2 3 4 5 6 7 8 9 10 Children _____________ are selected. Span 1! Span 2 Span 3! Span 4 Span 5! Span 6 Span 7! Your selector should select all yellow highlighted elements and no additional elements on the page. Write just the selector so that your answer could be copy-pasted into the following code block replacing the green highlighted comment and the code would be valid: /* your selector */ { /* styles here … */}

The expansion of railroad networks transformed the U.S. economy in the late 19th century.

Lynching was one form of violence used against Mexicans in the Southwest.