1. List two ways that parents can promote their adolescent’s academic achievement. Explain why each is “effective”.

2. Adolescents from immigrant families may experience acculturative stress. What is acculturative stress and how can social systems (for example, community, church, schools) help ease this conflict?

Open Air_Traffic data. SETUP: It is believed that in July, as years go by we see higher and higher traffic. Given the data your job is to confirm or disprove this assertion.

4. What test/procedure did you perform? (4 points)

• a. Regression
• b. Two sided t-test
• c. One sided t-test
• d. Confidence Interval

5. What is the statistical interpretation? (4 points)

• a. Average of data is inconsistent with the claim
• b. P-value is too large to have a conclusive answer
• c. P-value is smaller than 5% thus we are confident to say that the slope is not zero.
• d. P-value is smaller than 5% thus we are confident that the averages are different.
• e. None of these

6. What is the conclusion? (4 points)

• a. We cannot claim that in July, as years go by we see higher and higher traffic.
• b. We can claim that in July, as years go by we see higher and higher traffic.
• c. None of these

You are the account manager in charge of Internet advertising at Impact Sales. Spending on Internet advertising has increased steadily over the last few years and you predict the growth will continue.

) Do you think a linear model is appropriate for this data? Explain clearly.

f) Find a quadratic model for this data since 2000.

g) Which model better fits your data? Support your answer with a scatter plot of the data and both models on the same set of axis.

h) Using the quadratic model what is the average rate of change between 2002 and 2004?

i) As the account manager what would you budget for Internet advertising in 2008?

TABLE:

Year Internet Advertising Spending (Billions)

2001 0

2002 0.3

2003 0.8

2004 1.9

2005 3

2006 4.3

2007 5.8

Are the following items included in GDP? If they are not, briefly (1 sentence) explain why they are not.

1. Delta sells one of its existing airplanes to Korean air.
2. A California winery produces a bottle of Chardonnay and sells it to a customer in Montreal, Canada
3. An American buys a bottle of French perfume.
4. A college student buys pizza for dinner.

1. Nominal GDP in 2003                ________________
2. Nominal GDP in 2004                ________________
3. Real GDP in 2003                      ________________
4. Real GDP 2004                          ________________

3. Find the correlation and regression lines for the data above.

r=

LinReg(ax+b)=

Estimate a linear time trend for the Netflix data using data for the period 2000Q1 ... Estimate a linear time trend for the Netflix data using data for the period 2000Q1 to 2008Q4. a. Carry out a preliminary analysis of the data including a line fit plot and interpret your results. b. Test whether the slope is significantly different from zero, using alpha = 0.05. c. Compute S and R2 and interpret the results. d. Compute point forecasts for sales in each quarter of 2009. e. Comment upon your results. Note: you can use Regression under the Data Analysis tool in Microsoft Excel.

     Meadows Laboratories holds a valuable patent for a “gazak”. The history of costs

     associated with the “gazak” are as follows.

           Date                 Activity          Cost

     2000 – 2001     Research conducted to develop “gazak”                       $117,000

     Mar. 2002         Design and construction of a prototype                             81,500

     Oct. 2002          Testing simulations                                                           36,750

     Feb. 2003         Redesigning based on simulation results                         41,250

     Apr. 2004          Legal fees paid for patent granted May, 2004                   69,955

     May. 2008         Legal fees paid to successfully defend patent                  23,205

     Jan. 2010          Research aimed at modifying the “gazak” design             17,500

     Oct. 2013          Legal fees paid to successfully defend patent                  11,240

     Meadows assumed a useful life of 17 years for the patent in May, 2004. On January

     1, 2012, it revised its useful life estimate downward to 6 remaining years.

     Amortization is computed for a full year if the cost is incurred prior to July 1, and no

     amortization for the year if the cost is incurred after June 30. The company’s year

     ends December 31.

Instructions – Compute the carrying value of the “gazak” on each of the following dates:

1. December 31, 2005
2. December 31, 2008
3. December 31, 2011
4. December 31, 2013
5. December 31, 2015

a. In 2002 to 2004, there were 4948 Ontario residents applied to the province’s medical schools. Of these 4948 applicants, 4588 were from urban areas and the rest were from rural areas. Statistics Canada reported that 13% of the Ontario’s population live in rural areas. Do the data suggest that rural students were underrepresented among the applicants for this two-year period? Perform the test at the significance level of 0.01.

b. Assume a sample (x₁, . . . , x_n) from a normal population with mean µ and a known variance σ₀². A researcher is interested in testing if the true population mean is greater than µ₀. Find the range of the sample mean x̅ such that the researcher will reject the null hypothesis at 5% level of significance.

c. The result in part (b) is known as the rejection region. It is given to you that from a given sample, we have n = 25, σ₀² = 4 and the rejection region obtained in part (b) is x̅ > 1.658. What is the chance of a sample mean falling in the rejection region if the true µ is 2?