A biostatistician finds the relationship between the number of weeks (X) spent in a hospital and number of seizures per week (Y) and is described by the following equation: . This is based on a sample size of 50 patients and the associated coefficient of correlation is r = -.19. Using this information above, answer the following question: How do you interpret the slope of b1 = -.81?

Conduct a hypothesis test based on the following information using a significance level of 1%: Research Question: Are people running less than 20.72 miles per week? Population standard deviation was NOT KNOWN Test statistic = -1.79 Sample size = 31

Suppose you wish to determine if students in the College of Public Health have higher GPAs than that of students in the college of Medicine at USF.  If you have a group of 100 students and randomly assign which college each student should enroll in and track their academic progress until they graduate, then compare their GPA’s what kind of study was conducted?

A graduate student is registering for 3 courses in one semester. X=the number of courses that are full at the time of registration.  The random variable X has a probability distribution as follows x 0 1 2 3 p(x) 0.55 0.25 0.15 0.05 The probability that less than one of the classes are full at the time of registration [P(X < 1)] is equal to

To investigate the prevalence rate of diabetes among men in Florida, we drew a random sample of 60 men from that population and among them 25 people had diabetes. For the following hypotheses, what would be your conclusion based on the information provided? The level of significance (alpha level) is 0.05. Ho:  P 0.2 (Alternative)

Using the following information select the appropriate interpretation for the correlation coefficient: Variables being compared are age in years and annual salary. r = +0.12

Thirteen students were randomly selected from the College of Public Health and their diastolic blood pressure was tested. The sample mean and standard deviation were 80.9 mmHg and 2.1 mmHg respectively. What is the obtained t-score for this sample under the null hypothesis Ho: µ = 80?

Using the information below calculate the predicted value for Y for the given value of X. Y (Dependent Variable) = Cost of a house in thousands of dollars (i.e. Y = 1 means one-thousand dollars) X (Independent Variable) = number of miles from an elementary school   yhat =  325 – 6*X   On average how many thousands of dollars will a house cost if it is 15 miles from an elementary school (round your answer to 4 decimal places)?

A researcher would like to study BMI levels in adults 20-40 years of age. She selected 9 patients and found their BMI values to be: 26, 20, 28, 32, 29, 38, 21, 25, 23The standard deviation of BMI levels of this group of patients is

Select the term that best fits this definition: This equals the expected value of a sample mean for a sampling distribution