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Homework answers / question archive / Biostats SDS 328M Homework 4 Part 1 – Hand work (all work must be done by hand)
Biostats SDS 328M Homework 4
Write your answers onto one or more separate sheets of paper. Clearly mark each sheet with your name and your lab time.
Round all answers to at least 3 decimal places and assume that α=0.05 unless otherwise noted.
a. What is the probability that all five times in your sample are between 15.00 and
15.50 ms? (3pt)
15.00 and 15.50 ms? (3pt)
Part 2 – R work (must be done in R)
Copy and paste your R code and output into a word document to submit to Canvas.
Follow these instructions to import the necessary dataset:
x Before opening the dataset needed for this problem, you’ll need to call the “car” package (if you didn’t install this package for HW3, go back to that assignment for directions on how to install it). Run the following line of code:
> library(car)
x Now you can import the “Robey” dataset and use it to answer the question below. Name the data frame with your UT EID:
> my_eid <- Robey
Remember to include any code you use along with your answers in your submission!
3. The Robey dataset contains fertility rates from a sample of countries. The row.names variable lists the country name and region gives the region each country is in. The tfr variable is the total fertility rate (average number of children per woman), and contraceptors is the percent of married women of childbearing age who use contraception.