A researcher wishes to test the effectiveness of a flu vaccination. 150 people are vaccinated, 180 people are vaccinated with a placebo, and 100 people are not vaccinated. The number in each group who later caught the flu was recorded. The results are shown below. Vaccinated Placebo Control Caught the flu 8 19 21 Did not catch the flu 142 161 70 Use a 0.05 significance level to test the claim that getting the flu is independent of vaccination treatment. What is the p-value?   Round to 4 decimal places Does the data support that getting the flu is dependent or independent of treatment?   Type dependent or independent.  

Determine the minimum sample size required to construct the following confidence interval: Margin of error: 0.012; confidence level: 93%;  p-hat and q-hat are unknown.  In your calculation round the critical value to 3 decimal places.

Find the mean of the probability distribution.  Round your anwer to 2 decimal places. x P(x) 0 0.26 1 0.11 2 0.16 3 0.05 4 0.42  

Which of the following Pandas statements prints the institutions that contain the string “Univ” in their name? 

What is the output of the following code? list(rankings.iloc)

Consider the following ancestry dictionary:  ancestry = {   “name”: “John”,    “age”: 28,    “born”: “Sheboygan”,    “parent”: {        “name”: “Dean”,        “age”: 53,        “born”: “Milwaukee”,        “parent”: {            “name”: “Mike”,            “age”: 74,            “born”: “Racine”,            “parent”: {                “name”: “Bill”,                “age”: 96,                “born”: “La Crosse”            }        }    }} Which line of code prints “Bill”

What is the output of the following code:  query(“””SELECT COUNT(DISTINCT(Year)) FROM rankings”””).iloc

Assume you want to parse the html code from the course office hours page  “https://cs220.cs.wisc.edu/sum25/office_hours.html” and will respond to requests by returning an HTML file. Which of the options below could replace the ??? in the code to successfully save the HTML code to a file on the user’s machine? import requestsfrom bs4 import BeautifulSoupdef download(url):    try:        r = requests.get(url)       f = open(“office_hours.html”, “w”, encoding=”utf-8″)       f.write(???)        print(“Success!”)    except requests.HTTPError:        print(“Error!”)download(“https://cs220.cs.wisc.edu/sum25/office_hours.html”)

Consider a Dataframe df of fire hydrants, with two columns: (1) year, and (2) BarrelDiameter that represent the year of construction of each fire hydrant and the barrel diameter. How can we draw a horizontal bar plot of the number of hydrants of each year?

Assume you have an html unordered list of stores with their links and the following code is provided: from bs4 import BeautifulSoup html_string = “””Stores    Store 1    Store 2    Store 3″””bs_obj = BeautifulSoup(html_string, “html.parser”)items = bs_obj.find_all(“a”)stores = ???print(stores) Which of the following answers could replace the ???’s so that the output of this code is: ‘www.store1.com’