A 20 year old student returned to the United States after a three month stay in Guatemala. She had visitied rural villages during her stay. She had lost weight, complained of fever, shortness of breath and had upper and lower eyelid edema in her right eye. She had hepatosplenomegaly with lymphadenopathy. EKG tracings revealed abnormal P, T and QRS peaks and an enlarged heart. Thick and thin Giemsa blood stains showed a flagellated parasite shown in the figure. 1) What is the name of this patient's illness? What is the parasite causing the infection (Genus and species)? 2) How did the patient acquire this infection? 3) What is the name given to the lesion that may develop at the site of innoculation of the parasite? 4) What is the name given to the unilateral edema of the eye seen in this patient? 5) What other complications could occur in this patient?

A recent debate about where in the United States skiers believe the skiing is best prompted the following survey. Test to see if the best ski area is independent of the level of the skier. (Use a significance level of 0.05.)

• Part (a)

  State the null hypothesis.

  Ski area is dependent on the level of the skier.Ski area is independent of the level of the skier.    

• Part (b)

  State the alternative hypothesis.

  Ski area is independent of the level of the skier.Ski area is dependent on the level of the skier.    

• Part (c)

  What are the degrees of freedom? (Enter an exact number as an integer, fraction, or decimal.)
  (No Response)

• Part (d)

  State the distribution to use for the test.

  χ²₂

  t₄

      

  χ²₄

  t₂

• Part (e)

  What is the test statistic? (Round your answer to two decimal places.)
  (No Response)

• Part (f)

  What is the p-value? (Round your answer to four decimal places.)
  (No Response)
  
  Explain what the p-value means for this problem.

  If H₀ is false, then there is a chance equal to the p-value that the value of the test statistic will be equal to or less than the calculated value.If H₀ is false, then there is a chance equal to the p-value that the value of the test statistic will be equal to or greater than the calculated value.    If H₀ is true, then there is a chance equal to the p-value that the value of the test statistic will be equal to or less than the calculated value.If H₀ is true, then there is a chance equal to the p-value that the value of the test statistic will be equal to or greater than the calculated value.

• Part (g)

  Sketch a picture of this situation. Label and scale the horizontal axis, and shade the region(s) corresponding to the p-value.

• Part (h)

  Indicate the correct decision ("reject" or "do not reject" the null hypothesis) and write the appropriate conclusion.(i) Alpha:
  α = (No Response)
  
  (ii) Decision:

  reject the null hypothesisdo not reject the null hypothesis    

  
  (iii) Reason for decision:

  Since α < p-value, we do not reject the null hypothesis.Since α > p-value, we reject the null hypothesis.    Since α > p-value, we do not reject the null hypothesis.Since α < p-value, we reject the null hypothesis.

  
  (iv) Conclusion:

  The best ski area and level of skier are independent.The best ski area and level of skier are not independent.  

1. Insomnia has become an epidemic in the United States. Much research has been done in the development of new pharmaceuticals to aide those who suffer from insomnia. Alternatives to the pharmaceuticals are being sought by sufferers. A new relaxation technique has been tested to see if it is effective in treating the disorder. Sixty insomnia sufferers between the ages of 18 to 40 with no underlying health conditions volunteered to participate in a clinical trial. They were randomly assigned to either receive the relaxation treatment or a proven pharmaceutical treatment. Thirty were assigned to each group. The amount of time it took each of them to fall asleep was measured and recorded. The data is shown below. Run an independent samples t-test to determine if the relaxation treatment is more effective than the pharmaceutical treatment at a level of significance of 0.05. copy and paste the chart from SPSS. Report the test statistic using correct APA formatting and interpret the results.

Refer to the following information on full-term births in the United States over a given period of time.

Use this information to estimate the probabilities of the following events.

(a) A randomly selected pregnant woman who reaches full term delivers twins. (Give the answer to three significant figures.)

(c) A randomly selected pregnant woman who reaches full term gives birth to more than a single child. (Give the answer to three significant figures.)

What is one of the major economic problems facing the United States today? Explain at least one instance of how this was a problem in the past, drawing on the past semester and the past three centuries of US economic history that we’ve studied. Although we have focused on many of the problems the US has faced and continues to face, we have also discussed several of its major successes. Pick one of these successes and discuss its economic effects.

Data from n = 113 hospitals in the United States are used to assess factors related to the likelihood that a hospital patients acquires an infection while hospitalized. The variables here are y = infection risk, x₁ = average length of patient stay, x₂ = average patient age, x₃ = measure of how many x-rays are given in the hospital. The Minitab output is as follows:

Regression Analysis: InfctRsk versus Stay, Age, Xray

Analysis of Variance

Model Summary

Coefficients

Regression Equation

1. Set up the hypothesis test to decide whether there is a connection between the infection risk and the group of predictors.
2. Then, decide, using tests, which of the predictors and constant should be in the final relationship.
3. Give the value of the coefficient of determination and tell what it means.

1. Since the end of the Civil War, real GDP per capita in the United States has grown at roughly
2 percent per year. Some scholars argue that the true standard of living for Americans has
increased faster than 2 percent per year, while others believe that standards of living have
increased more slowly than 2 percent per year. What types of arguments are used to justify
a higher or lower rate in the increase in the standard of living than that indicated by real
GDP per capita? Where do you stand on this issue, and why?

According to a government energy agency, the mean monthly household electricity bill in the United States in 2011 was $109.54. Assume the amounts are normally distributed with standard deviation $25.00. Use the TI-84 Plus calculator to answer the following.

(a) What proportion of bills are greater than $132?

(b) What proportion of bills are between $90 and $145?

(c) What is the probability that a randomly selected household had a monthly bill less than

$129? Round the answers to at least four decimal places.

The weight of male babies less than 2 months old in the United States is normally distributed with mean 12.3 pounds and standard deviation 3.8 pounds.

(a) Find the 84 th percentile of the baby weights.

(b) Find the 11 th percentile of the baby weights.

(c) Find the third quartile of the baby weights.

Use the TI-84 Plus calculator and round the answers to at least two decimal places.

The data below is a random sample of 3 observations drawn from the United States population. Use the data to answer the following questions

i. Find 95% confidence intervals of the population mean of experience and wage.

ii. Estimate ρe,w, the correlation between the variables experience and wage.

iii. Find βˆ 1 and βˆ 0, the estimates of the parameters in the following regression equation wage = β0 + β1education + ϵ

iv. Predict wages for a person with 15 years of education using your regression estimate.

v. Find the R2

wage education

16.20 12

12.36 13

14.40 12

12.00 12