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1. An experiment was performed on a certain metal to determine if the strength is a function of heating time (hours). Results based on 20 metal sheets are given below. Use the simple linear regression model.
∑X = 40∑X2 = 200∑Y = 70∑Y2 = 545∑XY = 320Find the estimated y intercept and slope and write the equation of the least squares regression line. Estimate Y when X is equal to 3 hours. Also determine the standard error, the Mean Square Error, the coefficient of determination and the coefficient of correlation.
2. Use the following results obtained from a simple linear regression analysis with 15 observations.
YHat= 35.5- (1.25)XR2= 0.8745 and sb1 = 0.50
Interpret regression results and the value of the coefficient of Determination. Predict the value of Y when X is equal to 10. Calculate the correlation coefficient between Y and X. Test to determine if there is a significant relationship between the independent and dependent variable at a = 0.05. Perform a two-tailed test.
advertising for this variable each student must fill in the table with whatever random values each student wants.
Find the probability that there are exactly 2 prescriptions for this drug in a given week and find the probability that there are no more than 5 prescriptions for this drug in a given week.
Two fair dice are thrown and you are told that both of them show an even value. What is the probability that exactly one of them shows a six? (I don't understand how they got the answer)
What are the variance and standard deviation?
A study of college football games shows that the number of holding penalties assessed has a mean of 2.3 penalties per game and a standard deviation of penalties per 1.1 game. What is the probability that, for a sample of 40 college games to be played..
Explain how and why you are using eight variables instead of the original number of 25. I gave the reasons and method adopted in one of the feedbacks.
According to the 2011 National Occupant Protection Use Survey, only 84% of drivers wear seat belts. Calculate the probabilities that out of 4 randomly selected drivers,
systolic and diastolic blood pressure of femalesthe following table represents systolic and diastolic blood pressure
How do you derive the formula of the normal distribution curve?
Identify the independent and dependent variables.Name the levels in your identified factor.nomial scaleState the within-group degrees of freedom and explain how you calculate it.
Select two variables that might be related, such as the number of hours a student watches TV and the number of credits the student has, or a baseball player's salary and the number of home runs per year the player scores. You will need to get..
A large company is interested in knowing whether there is any relationship between a persons age and that persons opinion about a new wage incentive plan. A random sample of 100 employees was selected and cross- classified as shown below.
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