Which indicator would be the best to use for a titration between 0.30 M NH4Cl with 0.30 M KOH?

1. methyl red, color change at pH 2-4
2. phenol red, color change at pH 6-8
3. thymol blue, color change at pH 8-10
4. alizarin yellow R, color change at pH 10-12
5. bromothymol blue, color change at pH 6-8

Consider the following results for independent samples taken from two populations.

Sample 1 Sample 2

n1 = 500 n2= 300

p1= 0.49 p2= 0.34

a. What is the point estimate of the difference between the two population proportions (to 2 decimals)?

b. Develop a 90% confidence interval for the difference between the two population proportions (to 4 decimals).
to

c. Develop a 95% confidence interval for the difference between the two population proportions (to 4 decimals).

The following data shows the price of PAO, Inc. stock over the last eight months. Month Price ($) 1 2.44 2 2.44 3 2.45 4 2.43 5 2.44 6 2.45 7 2.44 8 2.47 2. What kind of relationship exists between stock price and time (negative, positive, or no relation)? 3. In month 4, a new marketing campaign began. If stock price is an indicator of the campaign's success, was the campaign a success?

Consider the following results for independent samples taken from two populations.

a. What is the point estimate of the difference between the two population proportions (to 2 decimals)?  

b. Develop a 90% confidence interval for the difference between the two population proportions (to 4 decimals).  
  to   

c. Develop a 95% confidence interval for the difference between the two population proportions (to 4 decimals).  
  to   

1. State and explain three axioms of economics
2. Explain the following
a. Capitalism
b. Communism
c. Socialism
3. What is market failure?
4. State and explain 2 causes of market failure with an example and explain the example
5. State and explain 4 market system
6. What are the three economic questions? How do these three economic questions get addressed by different economic systems.
7. The relevance of Capitalism, Communism and Socialism

A firm is considering two projects, A and B. Each project will last for 4 years. The projects are INDEPENDENT. The projected cash flows for each project are shown below:

Year 0 1 2 3 4

Project A -20.00 8.00 8.00 6.00 4.00

Project B -30.00 10.00 10.00 11.00 9.00

The cost of capital for the firm is 10.00%. What is the NPV for project A at the cost of capital?

Answer Format: Currency: Round to: 2 decimal places.

Tables

CUSTOMER

RENTAL

CAR

VEHICLE_CATEGORY

Note that:

• You are asked to provide a general solution to each request. If the database contents change, each of your queries should continue to answer the information requested correctly.
• Simple queries are preferred; if your queries are unnecessarily complex you may lose marks.
• For the given sample data, your queries should be able to generate the same data and column names as shown in the result table for each request.
• You are not required to sort the results in any order unless requested.
• State any assumption that you make to clarify your understanding of the information request.

Provide appropriate queries for the following requirements

List the details of cars that are Toyota sedan. The details include registration number, make and model, the number of seats, manufactured year, category ID, and category name.

<SQL_QUERY>

Which cars have never been rented out? List the details that include the car’s registration number, make and model, number of seats, manufactured year, category as well as the daily hire rate.

<SQL_QUERY>

Which cars have been rented out more than once? Show the car’s

registration number, make and model, manufactured year, and the number of rentals.

<SQL_QUERY>

Find out the rental activities that have the most expensive cost. This includes the customer names, car registration numbers, make and models, the start hire dates, end hire dates and the costs. Note: You will need to use an aggregate function.        

<SQL_QUERY>

How many times of rental activity were from each customer? Show the customer name, phone, and the number of rentals. Order the list so that the customers who rented the most appear first.

<SQL_QUERY>

1. An experiment was run to examine the amount of time it takes to boil a given amount of water on the four different burners of her stove, and with 0, 2, 4, or 6 teaspoons of water. The numbers in parentheses are run order. The results of the design are given below. Use a=0.05 unless otherwise specified

1. Analyze the full model and check for significance
2. Reduce your model
3. Check the adequacy of this model
4. Determine which settings yield the shortest time

Stem-and-leaf of Tuition costs (thousands of dol   N = 40

Leaf Unit = 1

a. Did any colleges have a tuition of $20,000? If so, how many?

b. How many colleges have a tuition rate greater than $28,000?

c. Would you say that this data set has an outlier? Why or why not?

d. Based on the answer above, which of the following do you think would be true for this data set AND why? (Mean = Median, Mean<Median, Mean>Median)

e. Based on your answers to the above questions do you believe this data set is normal, skewed right or skewed left?

Can we predict the running time for Mr. Degges when he runs 3.1 miles on the track at the NDSU Wellness center?

Need: SAS output to analyze the model

Need: prediction equation

y-hat

SSE SST, error, F-test

What variables are significant

The variables are: Y = running time in minutes X1 = weight at the time of running X2 = number of days between running events

Year X1 X2   Y

2009 191.2 1 29.0

2009 192 1   27.80

2009 190.4 2 28.53

2009 190.4 3 28.10

2009 190.6 2   28

2009 190.6 0   27.43

2009 190.2 0 28

2009 191.8 1    27.27

2009 189.2 12 30.52

2009 189.2 0 28.95

2009 190.2 2 29.08

2015 168.6 14 29.92

2015 166.2 4   29.83

2015 165.0 2 28.37

2015 169.8 6 27.25

2015 169.4 4 27.85

2015 167.2 3 27.58

2015 166.6 2 27.10