Question: The droplevels() function drops unused levels from a factor or from factors in a data frame. Extract the observations in the data for which we

The droplevels() function drops unused levels from a factor or from factors in a data frame. Extract the observations in the data for which we know the mother's smoker status (either smoker or non-smoker) and drop the unused level from the Habit variable. Save this subset of the data as a separate data frame in the workspace. The subset of the data should contain all of the variables from the original data

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Mathematics Questions!

Question 1 The objective of this question is to give practice working with data frames and constructing basic graphics. (a) Read the dataset into R and save it to the workspace. The categorical...

I need to see the SPSS output. You need to have all z-scores, all charts, all descriptives data from SPSS, everything you used to answer the questions. I am sending you what the previous tutor sent...

Write 2 paragraphs about Macro risks and the term structure of interest rates article. No max word count, page count, or formatting requirements but has to be submit to my tutor's work as my own....

Coffin Corporation appropriately uses the installment-sales method of accounting to recognize income in its financial statements. The following information is available for 2014 and 2015....

Assume that Smith's Auto Sales paid $45,000 for equipment with a 15-year life and zero expected residual value. After using the equipment for six years, the company determines that the asset will...

Incomplete manufacturing cost data for Horizon Company for 2025 are presented as follows for these four independent situations. Instructions a. Determine the missing amount for each letter.b. Prepare...

Let X be a random variable with density function which is the density of the Cauchy distribution see Exercise 12 of Section 6.2. Prove that the expectation of X does not exist. 1 f(x) = (1+x)' -8

Shelby Organics produces bottled orange juice. Orange juice concentrate is typically bought and sold by the pound, and Shelby uses 50,000 pounds of orange juice concentrate each month. On December 1,...

Rapid Deliveries purchased a delivery truck on July 1, 2006, at a cost of $11,200. The truck has an estimated useful life of 4 years or 40,000 miles and a salvage value of $800. If the truck was...

Gapco manufactures three products, whose daily labor and raw material requirements are given in the following table. The profits per unit of the three products are $25, $30, and $22, respectively....

ENGINEERING MATHEMATICS FINAL ASSIGNMENT - QUESTION 3 3. (a) (i) Determine in terms of the positive constant a. (ii) Hence, show that I = 1 when f(a) = 2 arctan(a?) - a = 0. (iii) Use Newton's method...

Research by Ericsson and other suggests that about 10,000 hours of deliberate practice are required to become an expert. What is required for deliberate practice? Group of answer choices Focused...

International clothier Gap, Inc. is proud of its Code of Business Conduct that urges all those associated with the company to participate in "Doing the Right Thing." The business, founded in 1969,...

Suppose that a pay equity plan has just been put in place in your organization. The pay equity consulting firm did a job evaluation and assigned points to each of the male-dominated and...

While break bulk cargo ships are largely being scrapped in favour of container ships, they still have some use. Why would that be? Question 8 options: 1) These older ships have lower acquisition and...

1. Describe changes in the Nespresso business from the perspective of a business model 2. Assess Yanick Lang's performance as a business manager 3. Provide your opinion on measures to be taken by...

Question 8 Let F L O O R ( 1 ) + F L O O R ( 1 2 ) + F L O O R ( 1 3 ) + dots + F L O O R ( 1 n ) = CEILING ( 0 1 ) + CEILING ( 1 2 ) + CEILING ( 2 3 ) + dots + CEILING ( 1 - ( 1 n ) ) be given....

Suppose that the electrical potential at the point (x, y, z) is E(x, y, z) = x + y - 2z. What is the direction of the acceleration at the point (1,3,2)?

explain what accounting standards are and why they exist.

explain the nature of accounting principles and concepts;

3. Estimate the effect of growth on the need for external financing.