For Questions 11 to 15, start withan R command which creates DataFrameC, a dataframe filled with data from one of R's standard datasets. This dataset provides information about Air Quality in New York from 1 May to 30 September. install.packages("datasets") library(datasets) DataFrameC <- airquality > head (DataFrameC) Ozone Solar.R Wind Temp Month Day 1 41 190 7.4 67 51 2 36 118 8.0 72 3 12 149 12.6 74 4 18 313 11.5 62 5 NA NA 14.3 56 55 6 28 NA 14.9 66 56 [Handy tip- if you use Courier font, your tables will be easier to read. In R, you can change the font from the Drop Down menu, choosing EDIT/GUI preferences] Q11. What is the average temperature for the month of September only (that is, when the Month= 9)? Round to the nearest integer. 52 Answer: 53 5 4

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A: Your answer is given below.

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A:

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SQL

SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.  

Queries

A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.