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A 68-year-old male with a 40-pack-year smoking history and a known diagnosis of Chronic Obstructive Pulmonary Disease (COPD) presents to the clinic with a 5-day history of increased shortness of breath, increased sputum production, and a change in sputum color from clear to yellow-green. He reports using his albuterol inhaler more frequently than usual with minimal relief. His baseline COPD is managed with a long-acting muscarinic antagonist (LAMA). Vital signs: T 99.8°F, HR 92, RR 22, SpO2 91% on room air. Lung auscultation reveals bilateral expiratory wheezes and coarse crackles at the bases.  According to the GOLD (Global Initiative for Chronic Obstructive Lung Disease) guidelines, which of the following is the most appropriate initial outpatient management plan for this exacerbation?

Which of the following substances has the lowest density?  

Which of the following is not a physical change?  

A chemistry student measures the density of an unknown liquid by dividing its mass by its volume. The measured values are 18.475 g for the mass and 12.3 mL for the volume. The student enters the calculation into the calculator and gets: 18.475 g12.3 mL=1.5020325 g/mL\frac{18.475\text{ g}}{12.3\text{ mL}} = 1.5020325\text{ g/mL} However, the student reports 1.5020325 g/mL because “the calculator never lies.”  What is the correctly reported density, considering the rules for significant figures?

You are doing an experiment on how well a certain teaching method is working. The first teaching method is the “Fixed Mindset” teaching method that teaches students that their success is all “Innately driven” and the second teaching method is the “Growth Mindset” teaching method that teaches students that their success is primarily a product of “work and growth.” After taking an exam, here are your students scores: Fixed: 10, 10, 9, 8, 8, 4, 1, 1, 2, 3 Growth: 10, 9, 8, 7, 8, 8, 6, 7, 7, 8 Put both of these variables into RStudio and find the mean of each group. Take a screenshot of the work and upload the file here. Include your name, upload only one screenshot, and only jpeg.

Given the BrainSize.dat data, find the standard deviation of the IQ for males and females. Select the correct answer concerning standard deviation below:

Given the BrainSize.dat data, create a variable that is just the PIQ (which stands for IQ) for those who are female (Gender = 2). What is the variance of the IQ for females (rounded to the second decimal place)?

Take a screenshot of your R-Studio after completing all the problems for this exam and upload it here. Include your full name, only one screenshot, and ensure it is a jpeg.

The p-value associated with your friendʻs Z-score is (i.e., to get that z-score or higher; hint: pnorm in RStudio):

Which group had more variability in their IQ as measured by variance and standard deviation?