Fourteen students were randomly selected from the College of Public Health and their diastolic blood pressure was tested. The sample mean and standard deviation were 81.6 mmHg and 2.3 mmHg respectively. What is the obtained t-score for this sample under the null hypothesis Ho: µ = 80?

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 r = -.19?

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) = size of the house in hundreds of square feet (i.e. X = 1 means one-hundred square feet)   yhat = 10 + 12.3*X   On average how many thousands of dollars will a house cost if it is 20 hundred square feet (round your answer to 4 decimal places)?

Calculate the appropriate test statistic based on the information provided (round your answer to 4 decimal places): Research Question: Are more people who work from home satisfied with their job than people who work in an office? Group 1: People who work from home: Number of people who said they are satisfied with their job = 27 Sample size = 35   Group 2: People who work in an office: Number of people who said they are satisfied with their job = 19 Sample size = 30

In One Sample Proportion test, it is important to convert the sample proportion to a z-score first. In this example, we selected a random sample of size 120 from a pool of university students and asked whether they use the university gym on a regular basis. Eighty replied yes. Assuming that the population proportion under the null hypothesis is 50%, what is the z-score (test statistics) for the sample proportion?

Select the appropriate null and alternative hypothesis for the following research question: Do people enjoy playing video games more than playing sports? phat1 = proportion of people who enjoy playing video games more than sports phat2 proportion of people who enjoy playing sports more than video games

It is known that the population standard deviation of weight among females is 27. Assuming that we have a random sample of 150, what is the standard error of the average weight among women of a sample of this size?

Using the information below calculate the predicted value for Y for the given value of X. Y (Dependent Variable) = Cost of an annual pass to Disney in dollars X (Independent Variable) = Average number of people who visit each day in thousands of people (i.e. X = 1 means one-thousand people)   yhat = 2122.86 – 30*X   On average what would be the cost of an annual pass to Disney if the average number of people who attend each day was 52 thousand (round your answer to 4 decimal places)?

Calculate the appropriate test statistic based on the information provided (round your answer to 4 decimal places): Research Question: Do more than 70% of people who work from home play video games? Population proportion = 70% Number of people from sample who said they play video games = 42 Sample size = 50

To compare the treatment effects of two interventions, two independent samples of patient medical data were collected. The sample sizes are 23 and 21 respectively. Assuming that the two populations shared the same variance, the researchers decided to conduct a two independent samples test for the means. What would be the number of degrees of freedom for the obtained t statistic with these sample sizes?