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Using the information below calculate the predicted value for Y for the given value of X. Y (Dependent Variable) = Grade Point Average X (Independent Variable) = Average number of hours spent using electronic devices for entertainment purposes   yhat = 4 – 0.125*X   On average what would a person’s Grade Point Average be if they spend on average 8 hours using electronic devices for entertainment purposes (round your answer to 4 decimal places)?

To compare the treatment effects of two interventions, two independent samples of patient medical data were collected. The sample sizes are 20 and 26 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?

the coefficient of correlation r and the slope of the regression line:

Which of the following statements are true regarding Type I or Type II errors?

It is known that incomes from the USA follow a normal distribution with a mean of $55,000 and a standard deviation of $12,000.  A researcher took a sample of 1000 people in the USA and obtained a sample mean of $67,000 with a standard deviation of $18,000.  What are the characteristics of the sampling distribution.

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?

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: 38, 19, 25, 16, 29, 18, 34, 32, 30The standard deviation of BMI levels of this group of patients is

4 students apply to a PhD program. The program accepts 70% of all applicants. Students are accepted and rejected independently of each other. Let the random variable X represent the number out of the 4 students who get accepted from the PhD Program. (Hint: Binomial distribution with n=4 and p=70%)   What is the mean of the random variable? (round your answer to 4 decimal places)

To compare the treatment effects of two interventions, two independent samples of patient medical data were collected. The sample sizes are 20 and 22 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?

Suppose you wish to compare the mean GPA of students in the College of Public Health to the mean GPA of students in the college of Medicine at USF.  If you have a list of all the students the fit into your population of interest and randomly select 100 students to be apart of your study, what type of sampling are you doing?