Part II (4 points each question)    

Part III (6 points each question)Please complete these problems on paper and upload at the end of the exam.

 When asked to explain why statistical significance appears so often in research reports, a student says ‘Because saying that results are significant tells us that they cannot easily be explained by chance variation or sample error alone.’  

A Community Center was interested in the effect of their program on summer loss. Summer loss is the decrease in academic knowledge from the summer to the Fall of the new year. To test their program they drew a random sample of 20 students from the program.  The students were assessed before and after the 6 week program on a 36 item assessment.  Difference scores  were calculated for the 20 students and are summarized below. (These scores were calculated by subtracting the pre test from the post test score. Each box in the chart below is a difference score for one of the 20 students. For example, the first student’s difference score is 2, the second student’s  difference score is 0, the third student’s difference score is 6.   Difference Scores on Assessment Pre-Post Program (N=20)   At  .01 significance level, do the results support the effectiveness of the program slowing summer loss? Create a 90 % confidence interval. How does the confidence interval support your decision?  

   A researcher wants to perform a hypothesis test to determine whether the mean length of marriages in California differs from the mean length of marriages in Texas.  This is a right-tailed test.       

Question 1    This question consists of four statements. You are asked if each statement is true or false.     

What are two ways we can brainstorm for a comparison essay?

List 4 connectors that show contrast.

From this histogram, we see that diastolic blood pressure (the number on the bottom of your blood pressure reading) is approximately normally distributed within general populations with a mean of about 83 and a std dev of about 10. How would you estimate the mean and standard deviation of a normal data set if you only had a histogram (not the original data)? Suppose you are a researcher at Kaiser Permanente and you have access to the blood pressure readings of all patients at the Oakland offices. If one Kaiser Oakland office saw 100 patients last Thursday (and took each patient’s blood pressure), what’s the probability that the sample of 100 blood pressure measurements had an average diastolic reading between 85mmHg and 95mmHg? Assume the sample of 100 blood pressure measurements is random. Make sure to explain how you determined your answer.

According to educationcorner.com, CSU-Sacramento is in the top twenty nursing schools in the US. Suppose you know that 200 people apply to nursing school at CSU Sacramento next fall. Use the data found on this website to determine the probability that all 200 applications are accepted will   at least half of the 200 applications will be accepted Make sure to explain how you determined your answers.