Social Media Addiction. Researchers are concerned about the impact of Social Media (Facebook, Twitter, Instagram, etc.) on student’s focus. In particular, they believe that too much time spent on social media can negatively impact a student’s academic performance. The problem has gotten worse with the recent widespread use of smartphones. The first objective of the researchers is to find out, on average, how many hours per day on weekdays college students in the US spend on social media while using their smartphone. A random sample of 256 students resulted in a sample mean of 3.1 hours spent per weekday. They know from previous and more complete studies that the population standard deviation of this variable is 1.5 hours.

(b) Calculate a 95% confidence interval, for the unknown population mean, µ, by answering the following three questions below. Round the upper and lower bound values to two decimal places

. i. Find the appropriate critical value using the t-table (table D). (Give your answer to 2 decimal places.)

ii. What is the value of the lower bound of the 95% confidence interval? (Round your answer to 2 decimal places).

iii. What is the value of the upper bound of the 95% confidence interval? (Round your answer to 2 decimal places).

(d) One of the researchers is interested in an 85% confidence interval for the unknown population mean, µ.

i. Find the positive z-score (z ∗ ) for the corresponding confidence level. (Round your answer to 2 decimal places).

ii. Find the lower and the upper bound of the confidence interval. (Round your answer to 2 decimal places).

iii. [Free Response.] Suppose that the number of hours spent on social media on mobile on weekdays by all US college students does not follow a Normal distribution. Is the confidence interval trustworthy? That is, do you think you can really be 85% confident? Explain. (State Yes or No first followed by your explanation).

JAVA

Program 2: In Order

Using an IF/ELSE IF/ELSE structure, write a program that will prompt the user for three numbers and displays them in ascending order.

• First, the program will prompt the user for each of the three numbers.
• Next, find the smallest value of the three.
• Then decide which of the other two is the next smallest.
• Then have the program display the three numbers in ascending order.

Be sure to do the following:

1. Determine what the input will be, it's data type, and assign a variable for each value.
2. Determine what the output will be. Do you need new variables for the output or can you use the input again? There is no right or wrong answer here. It’s also possible you may have to develop your algorithms before you can decide whether you will use new variables for your output or just use the input variables. You can always change your mind if you find you need to.
3. Do you need any formulas?
4. Create an initial algorithm of the basic steps.
5. Develop the refined algorithm from the initial algorithm.

Be sure to include with your program as documentation:

1. The Program Prologue
2. The Input data
3. The Output data
4. Any Formulas you may have.
5. The Initial Algorithm
6. The Refined Algorithm

NOTE 1:

• DO NOT use the "return 0" code, end, break, or exit to force an exit from within your IF/ELSE structure.  Declare all variables within the data declaration section.
  • Let the program progress to the end of the main function.
  • The end of the main function is the only place that the “return 0” should be placed.
  • A SWITCH statement is the only place that the break command should be used.
• DO NOT use the "continue" statement.

NOTE 2:
1. Declare all variables within the data declaration section of each class and method.  (-5)
2   Do not get input on the same line as a variable declaration.  (-5)
3. Do not place an equation for computation on the same line as declaring a variable.  (-5)
4. Do not place an equation for computation on the same line an input statement.  (-5)
5. Do not place any computations within an output statement. (-5)

Test your program with the following sets of data:

1. First number: 3
   Second number: 2
   Third number: 1
2. First number: 3
   Second number: 1
   Third number: 2
3. First number: 1
   Second number: 2
   Third number: 3
   
4. First number: 1
   Second number: 3
   Third number: 2
   
5. First number: 2
   Second number: 1
   Third number: 3
6. First number: 2
   Second number: 3
   Third number: 1

1. What is the impact of economic sanctions? Pick one recent sanction the United States or the European Union or the United Nations imposed on a country and describe the impact in detail.

2. Is military action always necessary to back up a sanction? Why or why not? Support your position with recent examples.

Based on your analysis of the current marketing situation and observation of their current marketing campaigns, where are the new opportunities for Macy's to effectively market? Detail the competitive issues that may be faced and how these challenges will impact these opportunities. Does the internal situation in the company support these opportunities? If not, what are the investments that will have to be made?

Based on your analysis of the current marketing situation and observation of their current marketing campaigns, where are the new opportunities for Macy's to effectively market? Detail the competitive issues that may be faced and how these challenges will impact these opportunities. Does the internal situation in the company support these opportunities? If not, what are the investments that will have to be made?

An alien spaceship has landed in your backyard full of various types of aliens. They all are saying “I come in peace”,
but you’re not so sure. You consult your
trusty guide to alien encounters to find out
that that there are three criteria that
determine if an alien is telling the truth:
number of heads, type of weapon and
intensity of their eyes.
 Friendly features: squirt gun as weapon
 Unfriendly features: weapon (as long as it’s
not a squirt gun), beady eyes, more than two
heads

 Don’t ask about the type of weapon if you know the alien does not have a weapon
 If an alien has two or more unfriendly features he is unfriendly
o So beady eyes, three heads, but no weapon & the alien is an enemy
o So squirt gun, regardless of other features, the alien is friendly

Pseudocode (10 points)
 Create the document in using Microsoft Office Word or Power Point or the Open Office equivalent, as
long as I am able to open it.
 Start with a pseudocode. Write the pseudocode in English, step by step what you need to do to solve the
problem. There are many ways this can be done. Take your time and think about it.
 No flowchart is required, but you can certainly draw one if it helps you.
 put your name, date, section, and description of the program at the top of the page.
 save the file lastname_ch3AlienPseudocode

1. Provide a general definition for the concept of sensory adaptation. If you were a marketing manager for an air freshener company, why should you be concerned about sensory adaptation? At least two different household products are available in the marketplace that makes use of the phenomenon of sensory adaptation: Febreze’s NOTICEables. and Glade’s Lasting Impressions Air Freshener. Both products are air fresheners that use warmed oil to scent the air with fragrances. Explain, from a psychological standpoint, how this product works to support the claims made by the company. Be sure to include at least two features of human sensation or perception in your response.

Use the following information for the next five exercises. Two types of phone operating system are being tested to determine if there is a difference in the proportions of system failures (crashes). Fifteen out of a random sample of 150 phones with OS1 had system failures within the first eight hours of operation. Nine out of another random sample of 150 phones with OS2 had system failures within the first eight hours of operation. OS2 is believed to be more stable (have fewer crashes) than OS1.

a. Is this a test of means or proportions?

b. What is the random variable?

c. State the null and alternative hypotheses.

d. What is the p-value?

e. What can you conclude about the two operating systems?