The Center for Disease Control and Prevention reported in 2010 that 20% of Americans smoked tobacco. A random sample of n = 400 Americans found 83 who smoked. Test the claim that the population proportion of Americans who smoked has changed from 20% with a level of significance α = 0.10.

For each question you need to find the following

1. a) < 1 point > Write the given .

Step 1

b) < 2 points > Write the claim and its opposite , then determine which is the null hypothesis and which is the alternative hypothesis.

c) < 0.5 point >Write the type of test you are going to use ( LT , RT , or 2 T )

d) < 0.5 point > what distribution you are going to use ( z or t )

Step 2

Use a graphing Calculator: Find the calculated test statistic and the P- Value

i) < 0.5 > what did you use to find the CTS :   Z- Test, T – Test , or 1-PropZtest ( choose one of them)

        ii ) < 2 >Write the value of the calculated test statistics :   C. T . S : ( choose z or t ) =   

        iii) < 1.5 point > P -value =

Step 3   Analyze

Traditional Method < 3 points> P-value Method. < 2 points >

For traditional , you need to Sketch the graph For P-value method, you need to do

Shade the required area P-value             α Need to write the value of each

label the critical value/s compare the values ( < or > )

Label the C.T.S                     

Step 4 : Write

1. i) < 1 point > Decision: (no credit if your answer is just reject or fail to reject only ; you need to write the complete expression)
2. ii) < 3 points > Conclusion ( fill in) : There ___________ enough evidence to _____________

                         the ______________ that _______________

According to a national business travel association a 2010 survey, the average salary of a travel management professional is $96,850. Assume that the standard deviation of such salaries is $30,000. Consider a random sample of 50 travel management professionals and let Xbar represent the mean salary for the sample.

A. What is u xbar.

B. What is Standard deviation of x bar.

C. Describe the shape of the distribution.

D. Find the z-score for the value of xbar= 89,500

E. Find P(Xbar greater than 89,500)

The following is an Excel question:

You have been hired by Club 2010 to design and implement a worksheet for the "greeter"
at the door to use to determine whether people are old enough to enter. Create a model
that allows the user to enter his/her birth date. The model should compute the user’s age
and in another cell, it should appear either "Welcome" if the person is at least 21 years
old as of today, or "Sorry, you are underage" otherwise. Create at least 2 test cases to
obtain different results.

Show ALL FORMULAS used in getting the answer.

BP (British Petroleum) faced in 2010 a deep crisis as result of an accident -the worst environmental disaster in the United Stated up to date- in one of the prospection owned by the company. 11 people died, the equivalent to 4.9 million barrels were discharged in the Gulf of Mexico with devastating consequence to the marine life and $42.2 billion were claimed up to 2013 as civil liabilities.

Read the article “BP oil spill: Five years after 'worst environmental disaster' in US history, how bad was it really?”(http://www.telegraph.co.uk/news/worldnews/northamerica/usa/11546654/BP-oil-spill-Five-years-after-worst-environmental-disaster-in-US-history-how-bad-was-it-really.html) and answer the following questions:

Do you think that BP could have managed the crisis more effectively? Why or why not?

Could the reputational damage suffered by the company been avoided by a better/more adequate response?

Do you recall when the crisis was happening? What do you recall hearing about it from the media? Was the company doing enough to respond to the public at the time the crisis was happening?

1) A. In a Rasmussen Poll of 1020 adults in July 2010, 512 of those polled said that schools should ban sugary snacks and soft drinks. Do a majority of adults support a ban on sugary snacks and soft drinks? Perform a hypothesis test using a significance level of 10%

B. Historically, the percentage of U.S. residents who support stricter gun control laws been 54%.A recent Gallup Poll of 1011 people showed 499 in favor of stricter gun 10% control laws. Assume the poll was given to a random sample of people. Test the claim that the proportion of those favoring stricter gun control has fallen. Perform a hypothesis test, using a significance level of 1%

The 2010 U.S. Census found the chance of a household being a certain size, the data is in the table. Size of household 1 Person (26.7%),2 Person (33.6%), 3 Person (15.8%), 4 Person (13.7%), 5 Person (6.3%), 6 Person (2.4%), 7 or more (1.5%) a) Is it unusual for a household to have six people in the family? b) If you did come upon many families that had six people in the family, what would you think?

USE THE FOLLOWING DIRECTION FOR 1A AND 1B: In 2010, a random sample of 250 dog owners was taken and it was found that 140 owned more than one dog. Recently, a random sample of 400 dog owners showed that 200 owned more than one dog. Do these data indicate that the proportion of dog owners owning more than one dog has decreased? Use a 5% level of significance, and p1= proportion of dog owners who owned more than one dog in 2010. If you conduct hypothesis testing, you have to consider:

a. one-tailed test

b. two-tailed test

c. one-tailed test because sample proportions are different.

d. two-tailed test because sample size is large.

1b.) Assuming computed Z of 1.04 for the test, what is your conclusion?

a. Reject H0. Proportion of dog owners owning more than one dog has decreased.

b. Fail to reject H0. Proportion of dog owners owning more than one dog has decreased.

c. Reject H0. Proportion of dog owners owning more than one dog has not decreased.

d. Fail to reject H0. Proportion of dog owners owning more than one dog has not decreased.

e. None of the above.

1c.) A Rutgers University professor claims that there is no significant difference between proportion of female (f) and male students (m) of the university who exercise at least 15 minutes a day. What would be a proper conclusion if he collects data, conducts hypothesis test, and finds P-value of 0%.

a. Reject H0. There is a significant difference. --> I THINK THIS IS THE ANSWER BUT I JUST WANT TO KNOW WHY

b. Reject H0. There is no significant difference.

c. Fail to reject H0. There is a significant difference.

d. Fail to reject H0. There is no significant difference.

1d.) A Rutgers University professor claims that female students study more than male students. What would be a proper conclusion if he collects data from random sample of 200 males and sample of 343 females, and finds P-value of 0.65?

a. Reject H0. Female students study more than male students.

b. Fail to reject H0. Female students study more than male students.

c. Fail to reject H0. Female students study less than male students.

d. Fail to reject H0. Female students study almost the same as male students. ---> I THINK THIS IS THE ANSWER I JUST WANT TO KNOW WHY

Phoenix Airways Inc. is an airline company headquartered in Hong Kong. It was founded in 2010 and currently provides passenger and cargo services to more than 50 regional and international destinations. The passenger service is operated by Phoenix Airways under the brand name of “Phoenix” while the cargo service is provided by its wholly owned subsidiary, Phoenix Cargo. The airline operates a fleet consisting of Boeing 737, Airbus 320, Airbus A330, and Airbus A350 aircrafts. In September 2016, the airline launched a new passenger route between Hong Kong (HKG) and Los Angeles (LAX) in hopes of competing with the larger carriers in the market for long-haul flights. However, this route between Hong Kong (HKG) and Los Angeles (LAX) has continued to lose money to the point where the airline has been forced to consider whether to discontinue it. Required: Discuss factors that will affect the company’s decision to discontinue the HKG-LAX route, including quantitative and qualitative factors.

According to CDCP, in 2010 the average height of adult women/men in the USA was 63.8 inches, with the standard deviation of 2.7 inches.

Using R and calculate the following:

1. Standardized height (z-score) of a U.S. woman who is 71 inches tall

2. Find the data for adult women/men in the country of your choice and calculate their standardized height. Explain what the findings mean.

Gender,Height (inches),Weight (lbs)
Female,67,150
Male,67,140
Female,67,100
Female,62,185
Male,66,145
Female,62,140
Male,69,183
Female,68,140
Male,71,175
Male,66,108
Female,64,123
Male,66,215
Male,62,128
Female,59,91
Male,73,198
Female,59,175
Male,67,145
Male,64,118
Male,71,150
Male,71,125
Male,69,180
Female,59,94
Male,74,160
Female,63,190
Male,65,145
Male,69,160
Female,66,130
Female,63,120
Male,65,125

Faster Company purchased equipment in 2010 for $104,000 and estimated an $8,000 salvage value at the end of the equipment's 10-year useful life. At December 31, 2016, there was $67,200 in the Accumulated Depreciation account for this equipment using the straight-line method of depreciation. On March 31, 2017, the equipment was sold for $21,000.

         Prepare the appropriate journal entries to remove the equipment from the books of Faster Company on March 31, 2017.

(b)    Lewis Company sold equipment for $11,000. The equipment originally cost $25,000 in 2014 and $6,000 was spent on a major overhaul in 2017 (charged to the Equipment account). Accumulated Depreciation on the equipment to the date of disposal was $20,000.

         Prepare the appropriate journal entry to record the disposition of the equipment.

(c)    Selby Company sold equipment that had a book value of $13,500 for $15,000. The equipment originally cost $45,000 and it is estimated that it would cost $57,000 to replace the equipment.

         Prepare the appropriate journal entry to record the disposition of the equipment.