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eduard
2 years ago
13

Use Excel to develop a regression model for the Consumer Food Database (using the "Excel Databases.xls" file on Blackboard) to p

redict Annual Food Spending by Annual Household Income for those living in the Metro area only. Suppose a household in the metro area has an annual income of $60,000. Predict how much they spend on food per year. Write your answer as a number (do not include the $ sign or comma) and round to 2 decimal places.

Computers and Technology
1 answer:
m_a_m_a [10]2 years ago
5 0

Answer:

Step 1 : Create an Indicator Variable for metro cities using formula mentioned in formula bar.

Step 2: Filter the Data on Metro cities i.e. select only those cities with Metro Indicator 1.

Step 3: Paste this filtered data to a new sheet.

Step 4: Go to Data - Data Analysis - Regression

Step 5: Enter the range of Y-variable and X-variable as shown. Select Output range and click on residuals. It will give you Output Summary and the Predicted Values along with Residuals

Please see attachment

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Consider the following relation:CAR_SALE(Car#, Date_sold, Salesperson#, Commission%, Discount_amt)Assume that a car may be sold
GalinKa [24]

Answer:

The answer to this question can be given as:

Normalization:

Normalization usually includes the division of a table into two or more tables as well as defining a relation between the table. It is also used to check the quality of the database design. In the normalization, we use three-level that are 1NF, 2NF, 3NF.

First Normal Form (1NF):

In the 1NF each table contains unique data. for example employee id.  

Second Normal Form (2NF):

In the 2NF form, every field in a table that is not a determiner of another field's contents must itself be a component of the table's other fields.

Third Normal Form (3NF):

In the 3NF form, no duplication of information is allowed.

Explanation:

The explanation of the question can be given as:

  • Since all attribute values are single atomic, the given relation CAR_SALE is in 1NF.  
  • Salesperson# → commission% …Given  Thus, it is not completely dependent on the primary key {Car#, Salesperson#}. Hence, it is not in 2 NF.                                                                                                        

The 2 NF decomposition:

        CAR_SALE_1(Car#, Salesperson#, Date_sold, Discount_amt)

         CAR_SALE_2(Salesperson#, Commission%)

  • The relationship in question is not in 3NF because the nature of a transitive dependence occurs
  • Discount_amt → Date_sold → (Car#, Salesperson#) . Thus, Date_sold is neither the key itself nor the Discount amt sub-set is a prime attribute.  

The 3 NF decomposition :

        CAR_SALES_1A(Car#, Salesperson#, Date_sold)

        CAR_SALES_1B(Date_sold, Discount_amt)

        CAR_SALE_3(Salesperson#, Commission%)

5 0
2 years ago
The groups_per_user function receives a dictionary, which contains group names with the list of users. Users can belong to multi
Akimi4 [234]

The groups_per_user function receives a dictionary, which contains group names with the list of users.

Explanation:

The blanks to return a dictionary with the users as keys and a list of their groups as values is shown below :

def groups_per_user(group_dictionary):

   user_groups = {}

   # Go through group_dictionary

   for group,users in group_dictionary.items():

       # Now go through the users in the group

       for user in users:

       # Now add the group to the the list of

         # groups for this user, creating the entry

         # in the dictionary if necessary

         user_groups[user] = user_groups.get(user,[]) + [group]

   return(user_groups)

print(groups_per_user({"local": ["admin", "userA"],

       "public":  ["admin", "userB"],

       "administrator": ["admin"] }))

3 0
2 years ago
Driving is expensive. Write a program with a car's miles/gallon and gas dollars/gallon (both floats) as input, and output the ga
Ierofanga [76]

Answer:

x^{2} \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \int\limits^a_b {x} \, dx  \lim_{n \to \infty} a_n \sqrt{x} \sqrt[n]{x} \pi \alpha \frac{x}{y} x_{123} \beta

Explanation:

6 0
2 years ago
Read 2 more answers
Which of the following is not one of the four criteria for evaluating websites?
Flura [38]

Answer:validity

Explanation:

Because it dont sound right

5 0
2 years ago
Consider the following scenario: "You are an assistant to the accounting manager for a small company that sells sports equipment
Rzqust [24]

Answer:

1. Microsoft Excel helps data analysis through different spreadsheet queries and operations options.

2. Input data to the analysis of sales by product is required for the development of formula and extracting results.

3. The information of data source and frequency of report is required to start the work.

Explanation:

1. Microsoft Excel tool can be used to calculate the results of equipment. Obtained results can be displayed in charts and graphs from the excel.

2. Information like the quantity of sold items, remaining items are required to produce accurate, useful analysis.

Before starting assignment accounting manager will be asked the following questions.

1) Where does the input data come from?

2) Is analysis required on a daily basis or once for all provided data?

3) Is Summary is in the form of tabular data, Graphical data, or Both?

4 0
2 years ago
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