Which of the following datasets are examples of cross-sectional data? Select all that apply.

Use the Probit sheet. An online retailer aims to predict whether a customer will make a repeat purchase using a probit 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 Probit sheet contains the descriptive statistics and probit regression results. What is the marginal effect of “customer tenure” at the mean? Report as a percent without the % sign, 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 GuestSpending sheet. Develop a multiple linear regression model to predict total guest spending based on length of stay and room type. Use Standard as the baseline room type. What is the estimated guest spending for a guest who stays 2 nights in a Deluxe room? Please round your answer to the nearest integer.

At Late But Great Logistics, package delivery times average 48 hours with a standard deviation of 6 hours. Delivery times follow a normal distribution. Using the empirical rule, what percentage of deliveries take between 36 hours and 66 hours? Please answer in one decimal place without the % mark.

Given the following HTML, write a CSS selector to select the yellow highlighted elements. 1 2 3 4 5 6 7 8 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 89 First Title Second Title Last Paragraph Third Title 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 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 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 1112 … …       … div:nth-child(1)

The following table lists selectors in the left column and HTML tags in the right column. Match the selectors to the HTML tag that they would match.